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Finding the Fourth Proportional to 880,520.70, 1,320,781.05 and 821,034.30

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Solution

The fourth proportional to 880,520.70, 1,320,781.05 and 821,034.30 is: 1,231,551.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,520.70 : 1,320,781.05 = 821,034.30 : x
  2. Step 2: Convert to fraction form
    880,520.70/1,320,781.05 = 821,034.30/x
  3. Step 3: Cross multiply
    880,520.70x = 1,320,781.05 × 821,034.30
  4. Step 4: Simplify right side
    880,520.70x = 1,084,406,544,840.02
  5. Step 5: Solve for x
    x = 1,084,406,544,840.02/880,520.70
  6. Step 6: Final answer
    x = 1,231,551.45

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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.