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Finding the Fourth Proportional to 880,801.70, 1,321,202.55 and 319,763.30

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Solution

The fourth proportional to 880,801.70, 1,321,202.55 and 319,763.30 is: 479,644.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,801.70 : 1,321,202.55 = 319,763.30 : x
  2. Step 2: Convert to fraction form
    880,801.70/1,321,202.55 = 319,763.30/x
  3. Step 3: Cross multiply
    880,801.70x = 1,321,202.55 × 319,763.30
  4. Step 4: Simplify right side
    880,801.70x = 422,472,087,356.42
  5. Step 5: Solve for x
    x = 422,472,087,356.42/880,801.70
  6. Step 6: Final answer
    x = 479,644.95

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Double scale
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Similar ratio
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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.