Home / 918,114.60-1,377,171.90-318,876.60

Finding the Fourth Proportional to 918,114.60, 1,377,171.90 and 318,876.60

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Solution

The fourth proportional to 918,114.60, 1,377,171.90 and 318,876.60 is: 478,314.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,114.60 : 1,377,171.90 = 318,876.60 : x
  2. Step 2: Convert to fraction form
    918,114.60/1,377,171.90 = 318,876.60/x
  3. Step 3: Cross multiply
    918,114.60x = 1,377,171.90 × 318,876.60
  4. Step 4: Simplify right side
    918,114.60x = 439,147,893,087.54
  5. Step 5: Solve for x
    x = 439,147,893,087.54/918,114.60
  6. Step 6: Final answer
    x = 478,314.90

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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.