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Finding the Fourth Proportional to 438,419.40, 657,629.10 and 349,845.90

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Solution

The fourth proportional to 438,419.40, 657,629.10 and 349,845.90 is: 524,768.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,419.40 : 657,629.10 = 349,845.90 : x
  2. Step 2: Convert to fraction form
    438,419.40/657,629.10 = 349,845.90/x
  3. Step 3: Cross multiply
    438,419.40x = 657,629.10 × 349,845.90
  4. Step 4: Simplify right side
    438,419.40x = 230,068,844,355.69
  5. Step 5: Solve for x
    x = 230,068,844,355.69/438,419.40
  6. Step 6: Final answer
    x = 524,768.85

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Similar ratio
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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.