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Finding the Fourth Proportional to 718,457.57, 991,435.08 and 408,352.03

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Solution

The fourth proportional to 718,457.57, 991,435.08 and 408,352.03 is: 563,505.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,457.57 : 991,435.08 = 408,352.03 : x
  2. Step 2: Convert to fraction form
    718,457.57/991,435.08 = 408,352.03/x
  3. Step 3: Cross multiply
    718,457.57x = 991,435.08 × 408,352.03
  4. Step 4: Simplify right side
    718,457.57x = 404,854,527,531.21
  5. Step 5: Solve for x
    x = 404,854,527,531.21/718,457.57
  6. Step 6: Final answer
    x = 563,505.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.