Home / 558,905.80-838,358.70-402,608.20

Finding the Fourth Proportional to 558,905.80, 838,358.70 and 402,608.20

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Solution

The fourth proportional to 558,905.80, 838,358.70 and 402,608.20 is: 603,912.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,905.80 : 838,358.70 = 402,608.20 : x
  2. Step 2: Convert to fraction form
    558,905.80/838,358.70 = 402,608.20/x
  3. Step 3: Cross multiply
    558,905.80x = 838,358.70 × 402,608.20
  4. Step 4: Simplify right side
    558,905.80x = 337,530,087,161.34
  5. Step 5: Solve for x
    x = 337,530,087,161.34/558,905.80
  6. Step 6: Final answer
    x = 603,912.30

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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.