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Finding the Fourth Proportional to 390,617.28, 585,732.06 and 124,343.16

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Solution

The fourth proportional to 390,617.28, 585,732.06 and 124,343.16 is: 186,453.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,617.28 : 585,732.06 = 124,343.16 : x
  2. Step 2: Convert to fraction form
    390,617.28/585,732.06 = 124,343.16/x
  3. Step 3: Cross multiply
    390,617.28x = 585,732.06 × 124,343.16
  4. Step 4: Simplify right side
    390,617.28x = 72,831,775,253.71
  5. Step 5: Solve for x
    x = 72,831,775,253.71/390,617.28
  6. Step 6: Final answer
    x = 186,453.03

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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.