Home / 918,010.80-1,377,016.20-319,647.60

Finding the Fourth Proportional to 918,010.80, 1,377,016.20 and 319,647.60

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Solution

The fourth proportional to 918,010.80, 1,377,016.20 and 319,647.60 is: 479,471.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,010.80 : 1,377,016.20 = 319,647.60 : x
  2. Step 2: Convert to fraction form
    918,010.80/1,377,016.20 = 319,647.60/x
  3. Step 3: Cross multiply
    918,010.80x = 1,377,016.20 × 319,647.60
  4. Step 4: Simplify right side
    918,010.80x = 440,159,923,491.12
  5. Step 5: Solve for x
    x = 440,159,923,491.12/918,010.80
  6. Step 6: Final answer
    x = 479,471.40

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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.