Home / 1,015.18-1,523.17-430.31

Finding the Fourth Proportional to 1,015.18, 1,523.17 and 430.31

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Solution

The fourth proportional to 1,015.18, 1,523.17 and 430.31 is: 645.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.18 : 1,523.17 = 430.31 : x
  2. Step 2: Convert to fraction form
    1,015.18/1,523.17 = 430.31/x
  3. Step 3: Cross multiply
    1,015.18x = 1,523.17 × 430.31
  4. Step 4: Simplify right side
    1,015.18x = 655,426.59
  5. Step 5: Solve for x
    x = 655,426.59/1,015.18
  6. Step 6: Final answer
    x = 645.63

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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.