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Finding the Fourth Proportional to 392,435.12, 588,718.29 and 155,779.85

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Solution

The fourth proportional to 392,435.12, 588,718.29 and 155,779.85 is: 233,695.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,435.12 : 588,718.29 = 155,779.85 : x
  2. Step 2: Convert to fraction form
    392,435.12/588,718.29 = 155,779.85/x
  3. Step 3: Cross multiply
    392,435.12x = 588,718.29 × 155,779.85
  4. Step 4: Simplify right side
    392,435.12x = 91,710,446,908.46
  5. Step 5: Solve for x
    x = 91,710,446,908.46/392,435.12
  6. Step 6: Final answer
    x = 233,695.82

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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.