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Finding the Fourth Proportional to 458,317.20, 687,475.80 and 432,073.20

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Solution

The fourth proportional to 458,317.20, 687,475.80 and 432,073.20 is: 648,109.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,317.20 : 687,475.80 = 432,073.20 : x
  2. Step 2: Convert to fraction form
    458,317.20/687,475.80 = 432,073.20/x
  3. Step 3: Cross multiply
    458,317.20x = 687,475.80 × 432,073.20
  4. Step 4: Simplify right side
    458,317.20x = 297,039,868,828.56
  5. Step 5: Solve for x
    x = 297,039,868,828.56/458,317.20
  6. Step 6: Final answer
    x = 648,109.80

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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.