Home / 839,125.80-1,258,688.70-278,160.30

Finding the Fourth Proportional to 839,125.80, 1,258,688.70 and 278,160.30

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Solution

The fourth proportional to 839,125.80, 1,258,688.70 and 278,160.30 is: 417,240.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,125.80 : 1,258,688.70 = 278,160.30 : x
  2. Step 2: Convert to fraction form
    839,125.80/1,258,688.70 = 278,160.30/x
  3. Step 3: Cross multiply
    839,125.80x = 1,258,688.70 × 278,160.30
  4. Step 4: Simplify right side
    839,125.80x = 350,117,226,398.61
  5. Step 5: Solve for x
    x = 350,117,226,398.61/839,125.80
  6. Step 6: Final answer
    x = 417,240.45

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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.