Home / 2,931.28-4,045.20-1,605.04

Finding the Fourth Proportional to 2,931.28, 4,045.20 and 1,605.04

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Solution

The fourth proportional to 2,931.28, 4,045.20 and 1,605.04 is: 2,214.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.28 : 4,045.20 = 1,605.04 : x
  2. Step 2: Convert to fraction form
    2,931.28/4,045.20 = 1,605.04/x
  3. Step 3: Cross multiply
    2,931.28x = 4,045.20 × 1,605.04
  4. Step 4: Simplify right side
    2,931.28x = 6,492,707.81
  5. Step 5: Solve for x
    x = 6,492,707.81/2,931.28
  6. Step 6: Final answer
    x = 2,214.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.