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Finding the Fourth Proportional to 388,479.13, 582,663.33 and 122,232.72

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Solution

The fourth proportional to 388,479.13, 582,663.33 and 122,232.72 is: 183,331.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,479.13 : 582,663.33 = 122,232.72 : x
  2. Step 2: Convert to fraction form
    388,479.13/582,663.33 = 122,232.72/x
  3. Step 3: Cross multiply
    388,479.13x = 582,663.33 × 122,232.72
  4. Step 4: Simplify right side
    388,479.13x = 71,220,523,670.16
  5. Step 5: Solve for x
    x = 71,220,523,670.16/388,479.13
  6. Step 6: Final answer
    x = 183,331.66

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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.