Home / 918,154.60-1,377,231.90-318,916.60

Finding the Fourth Proportional to 918,154.60, 1,377,231.90 and 318,916.60

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Solution

The fourth proportional to 918,154.60, 1,377,231.90 and 318,916.60 is: 478,374.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,154.60 : 1,377,231.90 = 318,916.60 : x
  2. Step 2: Convert to fraction form
    918,154.60/1,377,231.90 = 318,916.60/x
  3. Step 3: Cross multiply
    918,154.60x = 1,377,231.90 × 318,916.60
  4. Step 4: Simplify right side
    918,154.60x = 439,222,114,959.54
  5. Step 5: Solve for x
    x = 439,222,114,959.54/918,154.60
  6. Step 6: Final answer
    x = 478,374.90

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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.