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Finding the Fourth Proportional to 917,008.20, 1,375,706.70 and 277,259.40

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Solution

The fourth proportional to 917,008.20, 1,375,706.70 and 277,259.40 is: 415,947.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,008.20 : 1,375,706.70 = 277,259.40 : x
  2. Step 2: Convert to fraction form
    917,008.20/1,375,706.70 = 277,259.40/x
  3. Step 3: Cross multiply
    917,008.20x = 1,375,706.70 × 277,259.40
  4. Step 4: Simplify right side
    917,008.20x = 381,427,614,217.98
  5. Step 5: Solve for x
    x = 381,427,614,217.98/917,008.20
  6. Step 6: Final answer
    x = 415,947.88

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1.5x scale

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.