Home / 839,141.20-1,258,711.80-389,712.70

Finding the Fourth Proportional to 839,141.20, 1,258,711.80 and 389,712.70

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Solution

The fourth proportional to 839,141.20, 1,258,711.80 and 389,712.70 is: 584,569.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,141.20 : 1,258,711.80 = 389,712.70 : x
  2. Step 2: Convert to fraction form
    839,141.20/1,258,711.80 = 389,712.70/x
  3. Step 3: Cross multiply
    839,141.20x = 1,258,711.80 × 389,712.70
  4. Step 4: Simplify right side
    839,141.20x = 490,535,974,099.86
  5. Step 5: Solve for x
    x = 490,535,974,099.86/839,141.20
  6. Step 6: Final answer
    x = 584,569.05

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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.