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Finding the Fourth Proportional to 788,695.80, 1,183,043.70 and 505,260.60

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Solution

The fourth proportional to 788,695.80, 1,183,043.70 and 505,260.60 is: 757,890.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    788,695.80 : 1,183,043.70 = 505,260.60 : x
  2. Step 2: Convert to fraction form
    788,695.80/1,183,043.70 = 505,260.60/x
  3. Step 3: Cross multiply
    788,695.80x = 1,183,043.70 × 505,260.60
  4. Step 4: Simplify right side
    788,695.80x = 597,745,369,688.22
  5. Step 5: Solve for x
    x = 597,745,369,688.22/788,695.80
  6. Step 6: Final answer
    x = 757,890.90

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.