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Finding the Fourth Proportional to 261,142.40, 392,005.20 and 202,239.20

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Solution

The fourth proportional to 261,142.40, 392,005.20 and 202,239.20 is: 303,584.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,142.40 : 392,005.20 = 202,239.20 : x
  2. Step 2: Convert to fraction form
    261,142.40/392,005.20 = 202,239.20/x
  3. Step 3: Cross multiply
    261,142.40x = 392,005.20 × 202,239.20
  4. Step 4: Simplify right side
    261,142.40x = 79,278,818,043.84
  5. Step 5: Solve for x
    x = 79,278,818,043.84/261,142.40
  6. Step 6: Final answer
    x = 303,584.63

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1.5x scale

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.