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Finding the Fourth Proportional to 438,654.80, 657,107.40 and 228,411.20

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Solution

The fourth proportional to 438,654.80, 657,107.40 and 228,411.20 is: 342,161.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,654.80 : 657,107.40 = 228,411.20 : x
  2. Step 2: Convert to fraction form
    438,654.80/657,107.40 = 228,411.20/x
  3. Step 3: Cross multiply
    438,654.80x = 657,107.40 × 228,411.20
  4. Step 4: Simplify right side
    438,654.80x = 150,090,689,762.88
  5. Step 5: Solve for x
    x = 150,090,689,762.88/438,654.80
  6. Step 6: Final answer
    x = 342,161.28

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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.