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Finding the Fourth Proportional to 911,979, 1,258,531.02 and 509,571

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Solution

The fourth proportional to 911,979, 1,258,531.02 and 509,571 is: 703,207.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,979 : 1,258,531.02 = 509,571 : x
  2. Step 2: Convert to fraction form
    911,979/1,258,531.02 = 509,571/x
  3. Step 3: Cross multiply
    911,979x = 1,258,531.02 × 509,571
  4. Step 4: Simplify right side
    911,979x = 641,310,910,392.42
  5. Step 5: Solve for x
    x = 641,310,910,392.42/911,979
  6. Step 6: Final answer
    x = 703,207.98

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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.