Home / 438,425.40-657,638.10-389,436.60

Finding the Fourth Proportional to 438,425.40, 657,638.10 and 389,436.60

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Solution

The fourth proportional to 438,425.40, 657,638.10 and 389,436.60 is: 584,154.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,425.40 : 657,638.10 = 389,436.60 : x
  2. Step 2: Convert to fraction form
    438,425.40/657,638.10 = 389,436.60/x
  3. Step 3: Cross multiply
    438,425.40x = 657,638.10 × 389,436.60
  4. Step 4: Simplify right side
    438,425.40x = 256,108,345,694.46
  5. Step 5: Solve for x
    x = 256,108,345,694.46/438,425.40
  6. Step 6: Final answer
    x = 584,154.90

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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.