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Finding the Fourth Proportional to 788,429.10, 1,182,643.65 and 289,728.30

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Solution

The fourth proportional to 788,429.10, 1,182,643.65 and 289,728.30 is: 434,592.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    788,429.10 : 1,182,643.65 = 289,728.30 : x
  2. Step 2: Convert to fraction form
    788,429.10/1,182,643.65 = 289,728.30/x
  3. Step 3: Cross multiply
    788,429.10x = 1,182,643.65 × 289,728.30
  4. Step 4: Simplify right side
    788,429.10x = 342,645,334,220.30
  5. Step 5: Solve for x
    x = 342,645,334,220.30/788,429.10
  6. Step 6: Final answer
    x = 434,592.45

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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.