Home / 487,638.90-672,909.87-272,741.70

Finding the Fourth Proportional to 487,638.90, 672,909.87 and 272,741.70

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Solution

The fourth proportional to 487,638.90, 672,909.87 and 272,741.70 is: 376,365.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,638.90 : 672,909.87 = 272,741.70 : x
  2. Step 2: Convert to fraction form
    487,638.90/672,909.87 = 272,741.70/x
  3. Step 3: Cross multiply
    487,638.90x = 672,909.87 × 272,741.70
  4. Step 4: Simplify right side
    487,638.90x = 183,530,581,890.58
  5. Step 5: Solve for x
    x = 183,530,581,890.58/487,638.90
  6. Step 6: Final answer
    x = 376,365.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.