Home / 815,461.70-1,223,192.55-442,213.70

Finding the Fourth Proportional to 815,461.70, 1,223,192.55 and 442,213.70

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Solution

The fourth proportional to 815,461.70, 1,223,192.55 and 442,213.70 is: 663,320.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,461.70 : 1,223,192.55 = 442,213.70 : x
  2. Step 2: Convert to fraction form
    815,461.70/1,223,192.55 = 442,213.70/x
  3. Step 3: Cross multiply
    815,461.70x = 1,223,192.55 × 442,213.70
  4. Step 4: Simplify right side
    815,461.70x = 540,912,503,347.94
  5. Step 5: Solve for x
    x = 540,912,503,347.94/815,461.70
  6. Step 6: Final answer
    x = 663,320.55

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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.