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Finding the Fourth Proportional to 890,691.20, 1,336,036.80 and 802,044.80

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Solution

The fourth proportional to 890,691.20, 1,336,036.80 and 802,044.80 is: 1,203,067.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,691.20 : 1,336,036.80 = 802,044.80 : x
  2. Step 2: Convert to fraction form
    890,691.20/1,336,036.80 = 802,044.80/x
  3. Step 3: Cross multiply
    890,691.20x = 1,336,036.80 × 802,044.80
  4. Step 4: Simplify right side
    890,691.20x = 1,071,561,368,048.64
  5. Step 5: Solve for x
    x = 1,071,561,368,048.64/890,691.20
  6. Step 6: Final answer
    x = 1,203,067.20

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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.