Home / 390,153.13-585,229.68-109,670.38

Finding the Fourth Proportional to 390,153.13, 585,229.68 and 109,670.38

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Solution

The fourth proportional to 390,153.13, 585,229.68 and 109,670.38 is: 164,505.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,153.13 : 585,229.68 = 109,670.38 : x
  2. Step 2: Convert to fraction form
    390,153.13/585,229.68 = 109,670.38/x
  3. Step 3: Cross multiply
    390,153.13x = 585,229.68 × 109,670.38
  4. Step 4: Simplify right side
    390,153.13x = 64,182,361,392.88
  5. Step 5: Solve for x
    x = 64,182,361,392.88/390,153.13
  6. Step 6: Final answer
    x = 164,505.57

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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.