Home / 578,122.20-867,183.30-312,401.70

Finding the Fourth Proportional to 578,122.20, 867,183.30 and 312,401.70

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Solution

The fourth proportional to 578,122.20, 867,183.30 and 312,401.70 is: 468,602.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,122.20 : 867,183.30 = 312,401.70 : x
  2. Step 2: Convert to fraction form
    578,122.20/867,183.30 = 312,401.70/x
  3. Step 3: Cross multiply
    578,122.20x = 867,183.30 × 312,401.70
  4. Step 4: Simplify right side
    578,122.20x = 270,909,537,131.61
  5. Step 5: Solve for x
    x = 270,909,537,131.61/578,122.20
  6. Step 6: Final answer
    x = 468,602.55

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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.