Home / 839,141.70-1,258,712.55-389,713.20

Finding the Fourth Proportional to 839,141.70, 1,258,712.55 and 389,713.20

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Solution

The fourth proportional to 839,141.70, 1,258,712.55 and 389,713.20 is: 584,569.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,141.70 : 1,258,712.55 = 389,713.20 : x
  2. Step 2: Convert to fraction form
    839,141.70/1,258,712.55 = 389,713.20/x
  3. Step 3: Cross multiply
    839,141.70x = 1,258,712.55 × 389,713.20
  4. Step 4: Simplify right side
    839,141.70x = 490,536,895,740.66
  5. Step 5: Solve for x
    x = 490,536,895,740.66/839,141.70
  6. Step 6: Final answer
    x = 584,569.80

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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.