Home / 2,457.60-3,685.12-918.40

Finding the Fourth Proportional to 2,457.60, 3,685.12 and 918.40

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Solution

The fourth proportional to 2,457.60, 3,685.12 and 918.40 is: 1,377.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,457.60 : 3,685.12 = 918.40 : x
  2. Step 2: Convert to fraction form
    2,457.60/3,685.12 = 918.40/x
  3. Step 3: Cross multiply
    2,457.60x = 3,685.12 × 918.40
  4. Step 4: Simplify right side
    2,457.60x = 3,384,414.21
  5. Step 5: Solve for x
    x = 3,384,414.21/2,457.60
  6. Step 6: Final answer
    x = 1,377.12

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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.