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Finding the Fourth Proportional to 1,039.17, 1,433.77 and 724.08

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Solution

The fourth proportional to 1,039.17, 1,433.77 and 724.08 is: 999.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.17 : 1,433.77 = 724.08 : x
  2. Step 2: Convert to fraction form
    1,039.17/1,433.77 = 724.08/x
  3. Step 3: Cross multiply
    1,039.17x = 1,433.77 × 724.08
  4. Step 4: Simplify right side
    1,039.17x = 1,038,164.18
  5. Step 5: Solve for x
    x = 1,038,164.18/1,039.17
  6. Step 6: Final answer
    x = 999.03

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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.