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Finding the Fourth Proportional to 390,571.32, 585,856.98 and 124,330.68

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Solution

The fourth proportional to 390,571.32, 585,856.98 and 124,330.68 is: 186,496.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,571.32 : 585,856.98 = 124,330.68 : x
  2. Step 2: Convert to fraction form
    390,571.32/585,856.98 = 124,330.68/x
  3. Step 3: Cross multiply
    390,571.32x = 585,856.98 × 124,330.68
  4. Step 4: Simplify right side
    390,571.32x = 72,839,996,706.15
  5. Step 5: Solve for x
    x = 72,839,996,706.15/390,571.32
  6. Step 6: Final answer
    x = 186,496.02

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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.