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Finding the Fourth Proportional to 438,657.80, 657,111.90 and 228,414.20

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Solution

The fourth proportional to 438,657.80, 657,111.90 and 228,414.20 is: 342,165.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,657.80 : 657,111.90 = 228,414.20 : x
  2. Step 2: Convert to fraction form
    438,657.80/657,111.90 = 228,414.20/x
  3. Step 3: Cross multiply
    438,657.80x = 657,111.90 × 228,414.20
  4. Step 4: Simplify right side
    438,657.80x = 150,093,688,948.98
  5. Step 5: Solve for x
    x = 150,093,688,948.98/438,657.80
  6. Step 6: Final answer
    x = 342,165.78

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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.