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Finding the Fourth Proportional to 261,407.20, 392,499.60 and 202,309.60

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Solution

The fourth proportional to 261,407.20, 392,499.60 and 202,309.60 is: 303,765.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,407.20 : 392,499.60 = 202,309.60 : x
  2. Step 2: Convert to fraction form
    261,407.20/392,499.60 = 202,309.60/x
  3. Step 3: Cross multiply
    261,407.20x = 392,499.60 × 202,309.60
  4. Step 4: Simplify right side
    261,407.20x = 79,406,437,076.16
  5. Step 5: Solve for x
    x = 79,406,437,076.16/261,407.20
  6. Step 6: Final answer
    x = 303,765.30

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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.