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Finding the Fourth Proportional to 438,419.70, 657,629.55 and 432,514.80

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Solution

The fourth proportional to 438,419.70, 657,629.55 and 432,514.80 is: 648,772.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,419.70 : 657,629.55 = 432,514.80 : x
  2. Step 2: Convert to fraction form
    438,419.70/657,629.55 = 432,514.80/x
  3. Step 3: Cross multiply
    438,419.70x = 657,629.55 × 432,514.80
  4. Step 4: Simplify right side
    438,419.70x = 284,434,513,292.34
  5. Step 5: Solve for x
    x = 284,434,513,292.34/438,419.70
  6. Step 6: Final answer
    x = 648,772.20

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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.