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Finding the Fourth Proportional to 487,445.96, 672,448.75 and 315,419.52

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Solution

The fourth proportional to 487,445.96, 672,448.75 and 315,419.52 is: 435,132.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,445.96 : 672,448.75 = 315,419.52 : x
  2. Step 2: Convert to fraction form
    487,445.96/672,448.75 = 315,419.52/x
  3. Step 3: Cross multiply
    487,445.96x = 672,448.75 × 315,419.52
  4. Step 4: Simplify right side
    487,445.96x = 212,103,465,456.97
  5. Step 5: Solve for x
    x = 212,103,465,456.97/487,445.96
  6. Step 6: Final answer
    x = 435,132.26

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1.5x scale

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.