Home / 839,077.20-1,258,615.80-389,648.70

Finding the Fourth Proportional to 839,077.20, 1,258,615.80 and 389,648.70

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Solution

The fourth proportional to 839,077.20, 1,258,615.80 and 389,648.70 is: 584,473.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,077.20 : 1,258,615.80 = 389,648.70 : x
  2. Step 2: Convert to fraction form
    839,077.20/1,258,615.80 = 389,648.70/x
  3. Step 3: Cross multiply
    839,077.20x = 1,258,615.80 × 389,648.70
  4. Step 4: Simplify right side
    839,077.20x = 490,418,010,269.46
  5. Step 5: Solve for x
    x = 490,418,010,269.46/839,077.20
  6. Step 6: Final answer
    x = 584,473.05

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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.