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Finding the Fourth Proportional to 890,287.20, 1,335,430.80 and 801,640.80

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Solution

The fourth proportional to 890,287.20, 1,335,430.80 and 801,640.80 is: 1,202,461.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,287.20 : 1,335,430.80 = 801,640.80 : x
  2. Step 2: Convert to fraction form
    890,287.20/1,335,430.80 = 801,640.80/x
  3. Step 3: Cross multiply
    890,287.20x = 1,335,430.80 × 801,640.80
  4. Step 4: Simplify right side
    890,287.20x = 1,070,535,814,856.64
  5. Step 5: Solve for x
    x = 1,070,535,814,856.64/890,287.20
  6. Step 6: Final answer
    x = 1,202,461.20

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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.