Home / 839,140.20-1,258,710.30-389,711.70

Finding the Fourth Proportional to 839,140.20, 1,258,710.30 and 389,711.70

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Solution

The fourth proportional to 839,140.20, 1,258,710.30 and 389,711.70 is: 584,567.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,140.20 : 1,258,710.30 = 389,711.70 : x
  2. Step 2: Convert to fraction form
    839,140.20/1,258,710.30 = 389,711.70/x
  3. Step 3: Cross multiply
    839,140.20x = 1,258,710.30 × 389,711.70
  4. Step 4: Simplify right side
    839,140.20x = 490,534,130,820.51
  5. Step 5: Solve for x
    x = 490,534,130,820.51/839,140.20
  6. Step 6: Final answer
    x = 584,567.55

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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.