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Finding the Fourth Proportional to 906,805.70, 1,361,256.15 and 486,901.70

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Solution

The fourth proportional to 906,805.70, 1,361,256.15 and 486,901.70 is: 730,915.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    906,805.70 : 1,361,256.15 = 486,901.70 : x
  2. Step 2: Convert to fraction form
    906,805.70/1,361,256.15 = 486,901.70/x
  3. Step 3: Cross multiply
    906,805.70x = 1,361,256.15 × 486,901.70
  4. Step 4: Simplify right side
    906,805.70x = 662,797,933,570.46
  5. Step 5: Solve for x
    x = 662,797,933,570.46/906,805.70
  6. Step 6: Final answer
    x = 730,915.05

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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.