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Finding the Fourth Proportional to 642,382.57, 886,449.38 and 355,881.93

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Solution

The fourth proportional to 642,382.57, 886,449.38 and 355,881.93 is: 491,095.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,382.57 : 886,449.38 = 355,881.93 : x
  2. Step 2: Convert to fraction form
    642,382.57/886,449.38 = 355,881.93/x
  3. Step 3: Cross multiply
    642,382.57x = 886,449.38 × 355,881.93
  4. Step 4: Simplify right side
    642,382.57x = 315,471,316,201.70
  5. Step 5: Solve for x
    x = 315,471,316,201.70/642,382.57
  6. Step 6: Final answer
    x = 491,095.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.