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Finding the Fourth Proportional to 390,786.53, 585,873.55 and 154,306.22

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Solution

The fourth proportional to 390,786.53, 585,873.55 and 154,306.22 is: 231,338.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,786.53 : 585,873.55 = 154,306.22 : x
  2. Step 2: Convert to fraction form
    390,786.53/585,873.55 = 154,306.22/x
  3. Step 3: Cross multiply
    390,786.53x = 585,873.55 × 154,306.22
  4. Step 4: Simplify right side
    390,786.53x = 90,403,929,197.58
  5. Step 5: Solve for x
    x = 90,403,929,197.58/390,786.53
  6. Step 6: Final answer
    x = 231,338.40

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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.