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Finding the Fourth Proportional to 638,111.52, 880,599.80 and 351,641.86

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Solution

The fourth proportional to 638,111.52, 880,599.80 and 351,641.86 is: 485,269.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,111.52 : 880,599.80 = 351,641.86 : x
  2. Step 2: Convert to fraction form
    638,111.52/880,599.80 = 351,641.86/x
  3. Step 3: Cross multiply
    638,111.52x = 880,599.80 × 351,641.86
  4. Step 4: Simplify right side
    638,111.52x = 309,655,750,265.23
  5. Step 5: Solve for x
    x = 309,655,750,265.23/638,111.52
  6. Step 6: Final answer
    x = 485,269.02

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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.