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Finding the Fourth Proportional to 387,020.40, 580,530.60 and 235,461.30

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Solution

The fourth proportional to 387,020.40, 580,530.60 and 235,461.30 is: 353,191.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,020.40 : 580,530.60 = 235,461.30 : x
  2. Step 2: Convert to fraction form
    387,020.40/580,530.60 = 235,461.30/x
  3. Step 3: Cross multiply
    387,020.40x = 580,530.60 × 235,461.30
  4. Step 4: Simplify right side
    387,020.40x = 136,692,489,765.78
  5. Step 5: Solve for x
    x = 136,692,489,765.78/387,020.40
  6. Step 6: Final answer
    x = 353,191.95

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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.