Home / 438,117.30-657,435.15-288,789.30

Finding the Fourth Proportional to 438,117.30, 657,435.15 and 288,789.30

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Solution

The fourth proportional to 438,117.30, 657,435.15 and 288,789.30 is: 433,354.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,117.30 : 657,435.15 = 288,789.30 : x
  2. Step 2: Convert to fraction form
    438,117.30/657,435.15 = 288,789.30/x
  3. Step 3: Cross multiply
    438,117.30x = 657,435.15 × 288,789.30
  4. Step 4: Simplify right side
    438,117.30x = 189,860,236,763.90
  5. Step 5: Solve for x
    x = 189,860,236,763.90/438,117.30
  6. Step 6: Final answer
    x = 433,354.80

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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.