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Finding the Fourth Proportional to 458,899.20, 687,911.40 and 357,641.10

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Solution

The fourth proportional to 458,899.20, 687,911.40 and 357,641.10 is: 536,120.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,899.20 : 687,911.40 = 357,641.10 : x
  2. Step 2: Convert to fraction form
    458,899.20/687,911.40 = 357,641.10/x
  3. Step 3: Cross multiply
    458,899.20x = 687,911.40 × 357,641.10
  4. Step 4: Simplify right side
    458,899.20x = 246,025,389,798.54
  5. Step 5: Solve for x
    x = 246,025,389,798.54/458,899.20
  6. Step 6: Final answer
    x = 536,120.76

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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.