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Finding the Fourth Proportional to 390,617.26, 585,732.08 and 124,343.16

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Solution

The fourth proportional to 390,617.26, 585,732.08 and 124,343.16 is: 186,453.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,617.26 : 585,732.08 = 124,343.16 : x
  2. Step 2: Convert to fraction form
    390,617.26/585,732.08 = 124,343.16/x
  3. Step 3: Cross multiply
    390,617.26x = 585,732.08 × 124,343.16
  4. Step 4: Simplify right side
    390,617.26x = 72,831,777,740.57
  5. Step 5: Solve for x
    x = 72,831,777,740.57/390,617.26
  6. Step 6: Final answer
    x = 186,453.05

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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.