Home / 1,315.17-1,971.54-449.28

Finding the Fourth Proportional to 1,315.17, 1,971.54 and 449.28

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Solution

The fourth proportional to 1,315.17, 1,971.54 and 449.28 is: 673.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.17 : 1,971.54 = 449.28 : x
  2. Step 2: Convert to fraction form
    1,315.17/1,971.54 = 449.28/x
  3. Step 3: Cross multiply
    1,315.17x = 1,971.54 × 449.28
  4. Step 4: Simplify right side
    1,315.17x = 885,773.49
  5. Step 5: Solve for x
    x = 885,773.49/1,315.17
  6. Step 6: Final answer
    x = 673.50

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1.5x scale

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.