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Finding the Fourth Proportional to 261,372, 392,059.92 and 64,380

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Solution

The fourth proportional to 261,372, 392,059.92 and 64,380 is: 96,570.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,372 : 392,059.92 = 64,380 : x
  2. Step 2: Convert to fraction form
    261,372/392,059.92 = 64,380/x
  3. Step 3: Cross multiply
    261,372x = 392,059.92 × 64,380
  4. Step 4: Simplify right side
    261,372x = 25,240,817,649.60
  5. Step 5: Solve for x
    x = 25,240,817,649.60/261,372
  6. Step 6: Final answer
    x = 96,570.47

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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.