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Finding the Fourth Proportional to 689,813.55, 951,128.46 and 472,127.22

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Solution

The fourth proportional to 689,813.55, 951,128.46 and 472,127.22 is: 650,978.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,813.55 : 951,128.46 = 472,127.22 : x
  2. Step 2: Convert to fraction form
    689,813.55/951,128.46 = 472,127.22/x
  3. Step 3: Cross multiply
    689,813.55x = 951,128.46 × 472,127.22
  4. Step 4: Simplify right side
    689,813.55x = 449,053,635,682.68
  5. Step 5: Solve for x
    x = 449,053,635,682.68/689,813.55
  6. Step 6: Final answer
    x = 650,978.28

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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.