Home / 2,918.60-4,377.90-2,805.20

Finding the Fourth Proportional to 2,918.60, 4,377.90 and 2,805.20

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Solution

The fourth proportional to 2,918.60, 4,377.90 and 2,805.20 is: 4,207.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.60 : 4,377.90 = 2,805.20 : x
  2. Step 2: Convert to fraction form
    2,918.60/4,377.90 = 2,805.20/x
  3. Step 3: Cross multiply
    2,918.60x = 4,377.90 × 2,805.20
  4. Step 4: Simplify right side
    2,918.60x = 12,280,885.08
  5. Step 5: Solve for x
    x = 12,280,885.08/2,918.60
  6. Step 6: Final answer
    x = 4,207.80

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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.