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Finding the Fourth Proportional to 792,700.80, 1,189,051.20 and 509,265.60

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Solution

The fourth proportional to 792,700.80, 1,189,051.20 and 509,265.60 is: 763,898.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    792,700.80 : 1,189,051.20 = 509,265.60 : x
  2. Step 2: Convert to fraction form
    792,700.80/1,189,051.20 = 509,265.60/x
  3. Step 3: Cross multiply
    792,700.80x = 1,189,051.20 × 509,265.60
  4. Step 4: Simplify right side
    792,700.80x = 605,542,872,798.72
  5. Step 5: Solve for x
    x = 605,542,872,798.72/792,700.80
  6. Step 6: Final answer
    x = 763,898.40

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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.