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Finding the Fourth Proportional to 390,377.53, 585,624.62 and 124,146.73

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Solution

The fourth proportional to 390,377.53, 585,624.62 and 124,146.73 is: 186,238.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,377.53 : 585,624.62 = 124,146.73 : x
  2. Step 2: Convert to fraction form
    390,377.53/585,624.62 = 124,146.73/x
  3. Step 3: Cross multiply
    390,377.53x = 585,624.62 × 124,146.73
  4. Step 4: Simplify right side
    390,377.53x = 72,703,381,580.49
  5. Step 5: Solve for x
    x = 72,703,381,580.49/390,377.53
  6. Step 6: Final answer
    x = 186,238.64

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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.