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Finding the Fourth Proportional to 911,967.80, 1,258,493.61 and 498,486.02

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Solution

The fourth proportional to 911,967.80, 1,258,493.61 and 498,486.02 is: 687,898.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,967.80 : 1,258,493.61 = 498,486.02 : x
  2. Step 2: Convert to fraction form
    911,967.80/1,258,493.61 = 498,486.02/x
  3. Step 3: Cross multiply
    911,967.80x = 1,258,493.61 × 498,486.02
  4. Step 4: Simplify right side
    911,967.80x = 627,341,475,812.95
  5. Step 5: Solve for x
    x = 627,341,475,812.95/911,967.80
  6. Step 6: Final answer
    x = 687,898.71

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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.