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Finding the Fourth Proportional to 261,984.51, 392,968.44 and 72,456.30

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Solution

The fourth proportional to 261,984.51, 392,968.44 and 72,456.30 is: 108,682.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,984.51 : 392,968.44 = 72,456.30 : x
  2. Step 2: Convert to fraction form
    261,984.51/392,968.44 = 72,456.30/x
  3. Step 3: Cross multiply
    261,984.51x = 392,968.44 × 72,456.30
  4. Step 4: Simplify right side
    261,984.51x = 28,473,039,179.17
  5. Step 5: Solve for x
    x = 28,473,039,179.17/261,984.51
  6. Step 6: Final answer
    x = 108,682.15

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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.