Home / 438,430.20-657,818.10-172,145.40

Finding the Fourth Proportional to 438,430.20, 657,818.10 and 172,145.40

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Solution

The fourth proportional to 438,430.20, 657,818.10 and 172,145.40 is: 258,285.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,430.20 : 657,818.10 = 172,145.40 : x
  2. Step 2: Convert to fraction form
    438,430.20/657,818.10 = 172,145.40/x
  3. Step 3: Cross multiply
    438,430.20x = 657,818.10 × 172,145.40
  4. Step 4: Simplify right side
    438,430.20x = 113,240,359,951.74
  5. Step 5: Solve for x
    x = 113,240,359,951.74/438,430.20
  6. Step 6: Final answer
    x = 258,285.95

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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.