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Finding the Fourth Proportional to 390,069.60, 585,104.40 and 239,822.70

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Solution

The fourth proportional to 390,069.60, 585,104.40 and 239,822.70 is: 359,734.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,069.60 : 585,104.40 = 239,822.70 : x
  2. Step 2: Convert to fraction form
    390,069.60/585,104.40 = 239,822.70/x
  3. Step 3: Cross multiply
    390,069.60x = 585,104.40 × 239,822.70
  4. Step 4: Simplify right side
    390,069.60x = 140,321,316,989.88
  5. Step 5: Solve for x
    x = 140,321,316,989.88/390,069.60
  6. Step 6: Final answer
    x = 359,734.05

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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.