Home / 872,823.40-1,309,235.10-311,876.20

Finding the Fourth Proportional to 872,823.40, 1,309,235.10 and 311,876.20

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Solution

The fourth proportional to 872,823.40, 1,309,235.10 and 311,876.20 is: 467,814.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,823.40 : 1,309,235.10 = 311,876.20 : x
  2. Step 2: Convert to fraction form
    872,823.40/1,309,235.10 = 311,876.20/x
  3. Step 3: Cross multiply
    872,823.40x = 1,309,235.10 × 311,876.20
  4. Step 4: Simplify right side
    872,823.40x = 408,319,267,894.62
  5. Step 5: Solve for x
    x = 408,319,267,894.62/872,823.40
  6. Step 6: Final answer
    x = 467,814.30

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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.