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Finding the Fourth Proportional to 816,702.32, 1,126,959 and 489,998

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Solution

The fourth proportional to 816,702.32, 1,126,959 and 489,998 is: 676,143.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,702.32 : 1,126,959 = 489,998 : x
  2. Step 2: Convert to fraction form
    816,702.32/1,126,959 = 489,998/x
  3. Step 3: Cross multiply
    816,702.32x = 1,126,959 × 489,998
  4. Step 4: Simplify right side
    816,702.32x = 552,207,656,082
  5. Step 5: Solve for x
    x = 552,207,656,082/816,702.32
  6. Step 6: Final answer
    x = 676,143.12

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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.