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Finding the Fourth Proportional to 487,649, 672,969.12 and 272,826.20

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Solution

The fourth proportional to 487,649, 672,969.12 and 272,826.20 is: 376,507.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,649 : 672,969.12 = 272,826.20 : x
  2. Step 2: Convert to fraction form
    487,649/672,969.12 = 272,826.20/x
  3. Step 3: Cross multiply
    487,649x = 672,969.12 × 272,826.20
  4. Step 4: Simplify right side
    487,649x = 183,603,607,726.94
  5. Step 5: Solve for x
    x = 183,603,607,726.94/487,649
  6. Step 6: Final answer
    x = 376,507.71

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1.5x scale

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.