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Finding the Fourth Proportional to 611,708.70, 917,563.05 and 442,872.30

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Solution

The fourth proportional to 611,708.70, 917,563.05 and 442,872.30 is: 664,308.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,708.70 : 917,563.05 = 442,872.30 : x
  2. Step 2: Convert to fraction form
    611,708.70/917,563.05 = 442,872.30/x
  3. Step 3: Cross multiply
    611,708.70x = 917,563.05 × 442,872.30
  4. Step 4: Simplify right side
    611,708.70x = 406,363,258,348.52
  5. Step 5: Solve for x
    x = 406,363,258,348.52/611,708.70
  6. Step 6: Final answer
    x = 664,308.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.