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Finding the Fourth Proportional to 425,415.04, 638,099.52 and 129,904

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Solution

The fourth proportional to 425,415.04, 638,099.52 and 129,904 is: 194,848.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,415.04 : 638,099.52 = 129,904 : x
  2. Step 2: Convert to fraction form
    425,415.04/638,099.52 = 129,904/x
  3. Step 3: Cross multiply
    425,415.04x = 638,099.52 × 129,904
  4. Step 4: Simplify right side
    425,415.04x = 82,891,680,046.08
  5. Step 5: Solve for x
    x = 82,891,680,046.08/425,415.04
  6. Step 6: Final answer
    x = 194,848.96

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1.5x scale

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.