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Finding the Fourth Proportional to 822,759.60, 1,234,139.40 and 290,276.40

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Solution

The fourth proportional to 822,759.60, 1,234,139.40 and 290,276.40 is: 435,414.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    822,759.60 : 1,234,139.40 = 290,276.40 : x
  2. Step 2: Convert to fraction form
    822,759.60/1,234,139.40 = 290,276.40/x
  3. Step 3: Cross multiply
    822,759.60x = 1,234,139.40 × 290,276.40
  4. Step 4: Simplify right side
    822,759.60x = 358,241,542,130.16
  5. Step 5: Solve for x
    x = 358,241,542,130.16/822,759.60
  6. Step 6: Final answer
    x = 435,414.60

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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.