Home / 2,920.40-4,381.29-972.62

Finding the Fourth Proportional to 2,920.40, 4,381.29 and 972.62

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Solution

The fourth proportional to 2,920.40, 4,381.29 and 972.62 is: 1,459.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.40 : 4,381.29 = 972.62 : x
  2. Step 2: Convert to fraction form
    2,920.40/4,381.29 = 972.62/x
  3. Step 3: Cross multiply
    2,920.40x = 4,381.29 × 972.62
  4. Step 4: Simplify right side
    2,920.40x = 4,261,305.94
  5. Step 5: Solve for x
    x = 4,261,305.94/2,920.40
  6. Step 6: Final answer
    x = 1,459.15

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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.