Home / 858,135.70-1,287,203.55-218,438.20

Finding the Fourth Proportional to 858,135.70, 1,287,203.55 and 218,438.20

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Solution

The fourth proportional to 858,135.70, 1,287,203.55 and 218,438.20 is: 327,657.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,135.70 : 1,287,203.55 = 218,438.20 : x
  2. Step 2: Convert to fraction form
    858,135.70/1,287,203.55 = 218,438.20/x
  3. Step 3: Cross multiply
    858,135.70x = 1,287,203.55 × 218,438.20
  4. Step 4: Simplify right side
    858,135.70x = 281,174,426,495.61
  5. Step 5: Solve for x
    x = 281,174,426,495.61/858,135.70
  6. Step 6: Final answer
    x = 327,657.30

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Double scale
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Similar ratio
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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.