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Finding the Fourth Proportional to 868,843.60, 1,303,265.40 and 513,674.80

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Solution

The fourth proportional to 868,843.60, 1,303,265.40 and 513,674.80 is: 770,512.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,843.60 : 1,303,265.40 = 513,674.80 : x
  2. Step 2: Convert to fraction form
    868,843.60/1,303,265.40 = 513,674.80/x
  3. Step 3: Cross multiply
    868,843.60x = 1,303,265.40 × 513,674.80
  4. Step 4: Simplify right side
    868,843.60x = 669,454,593,691.92
  5. Step 5: Solve for x
    x = 669,454,593,691.92/868,843.60
  6. Step 6: Final answer
    x = 770,512.20

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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.