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Finding the Fourth Proportional to 580,086.10, 870,129.15 and 540,720.10

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Solution

The fourth proportional to 580,086.10, 870,129.15 and 540,720.10 is: 811,080.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,086.10 : 870,129.15 = 540,720.10 : x
  2. Step 2: Convert to fraction form
    580,086.10/870,129.15 = 540,720.10/x
  3. Step 3: Cross multiply
    580,086.10x = 870,129.15 × 540,720.10
  4. Step 4: Simplify right side
    580,086.10x = 470,496,321,000.92
  5. Step 5: Solve for x
    x = 470,496,321,000.92/580,086.10
  6. Step 6: Final answer
    x = 811,080.15

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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.