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Finding the Fourth Proportional to 390,077.70, 585,116.55 and 366,458.10

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Solution

The fourth proportional to 390,077.70, 585,116.55 and 366,458.10 is: 549,687.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,077.70 : 585,116.55 = 366,458.10 : x
  2. Step 2: Convert to fraction form
    390,077.70/585,116.55 = 366,458.10/x
  3. Step 3: Cross multiply
    390,077.70x = 585,116.55 × 366,458.10
  4. Step 4: Simplify right side
    390,077.70x = 214,420,699,191.56
  5. Step 5: Solve for x
    x = 214,420,699,191.56/390,077.70
  6. Step 6: Final answer
    x = 549,687.15

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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.