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Finding the Fourth Proportional to 385,010.15, 577,471.11 and 100,728.16

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Solution

The fourth proportional to 385,010.15, 577,471.11 and 100,728.16 is: 151,080.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,010.15 : 577,471.11 = 100,728.16 : x
  2. Step 2: Convert to fraction form
    385,010.15/577,471.11 = 100,728.16/x
  3. Step 3: Cross multiply
    385,010.15x = 577,471.11 × 100,728.16
  4. Step 4: Simplify right side
    385,010.15x = 58,167,600,542.05
  5. Step 5: Solve for x
    x = 58,167,600,542.05/385,010.15
  6. Step 6: Final answer
    x = 151,080.70

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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.