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Finding the Fourth Proportional to 390,559.80, 585,839.70 and 110,077.05

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Solution

The fourth proportional to 390,559.80, 585,839.70 and 110,077.05 is: 165,115.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,559.80 : 585,839.70 = 110,077.05 : x
  2. Step 2: Convert to fraction form
    390,559.80/585,839.70 = 110,077.05/x
  3. Step 3: Cross multiply
    390,559.80x = 585,839.70 × 110,077.05
  4. Step 4: Simplify right side
    390,559.80x = 64,487,505,948.89
  5. Step 5: Solve for x
    x = 64,487,505,948.89/390,559.80
  6. Step 6: Final answer
    x = 165,115.58

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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.