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Finding the Fourth Proportional to 438,192.70, 657,310.65 and 228,240.70

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Solution

The fourth proportional to 438,192.70, 657,310.65 and 228,240.70 is: 342,372.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,192.70 : 657,310.65 = 228,240.70 : x
  2. Step 2: Convert to fraction form
    438,192.70/657,310.65 = 228,240.70/x
  3. Step 3: Cross multiply
    438,192.70x = 657,310.65 × 228,240.70
  4. Step 4: Simplify right side
    438,192.70x = 150,025,042,873.46
  5. Step 5: Solve for x
    x = 150,025,042,873.46/438,192.70
  6. Step 6: Final answer
    x = 342,372.30

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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.