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Finding the Fourth Proportional to 656,751.60, 985,127.40 and 420,555.60

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Solution

The fourth proportional to 656,751.60, 985,127.40 and 420,555.60 is: 630,833.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,751.60 : 985,127.40 = 420,555.60 : x
  2. Step 2: Convert to fraction form
    656,751.60/985,127.40 = 420,555.60/x
  3. Step 3: Cross multiply
    656,751.60x = 985,127.40 × 420,555.60
  4. Step 4: Simplify right side
    656,751.60x = 414,300,844,783.44
  5. Step 5: Solve for x
    x = 414,300,844,783.44/656,751.60
  6. Step 6: Final answer
    x = 630,833.40

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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.