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Finding the Fourth Proportional to 438,672.80, 657,134.40 and 228,429.20

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Solution

The fourth proportional to 438,672.80, 657,134.40 and 228,429.20 is: 342,188.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,672.80 : 657,134.40 = 228,429.20 : x
  2. Step 2: Convert to fraction form
    438,672.80/657,134.40 = 228,429.20/x
  3. Step 3: Cross multiply
    438,672.80x = 657,134.40 × 228,429.20
  4. Step 4: Simplify right side
    438,672.80x = 150,108,685,284.48
  5. Step 5: Solve for x
    x = 150,108,685,284.48/438,672.80
  6. Step 6: Final answer
    x = 342,188.27

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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.