Home / 1,315.56-1,972.32-482.40

Finding the Fourth Proportional to 1,315.56, 1,972.32 and 482.40

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Solution

The fourth proportional to 1,315.56, 1,972.32 and 482.40 is: 723.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.56 : 1,972.32 = 482.40 : x
  2. Step 2: Convert to fraction form
    1,315.56/1,972.32 = 482.40/x
  3. Step 3: Cross multiply
    1,315.56x = 1,972.32 × 482.40
  4. Step 4: Simplify right side
    1,315.56x = 951,447.17
  5. Step 5: Solve for x
    x = 951,447.17/1,315.56
  6. Step 6: Final answer
    x = 723.23

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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.