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Finding the Fourth Proportional to 817.47, 1,127.36 and 608.17

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Solution

The fourth proportional to 817.47, 1,127.36 and 608.17 is: 838.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.47 : 1,127.36 = 608.17 : x
  2. Step 2: Convert to fraction form
    817.47/1,127.36 = 608.17/x
  3. Step 3: Cross multiply
    817.47x = 1,127.36 × 608.17
  4. Step 4: Simplify right side
    817.47x = 685,626.53
  5. Step 5: Solve for x
    x = 685,626.53/817.47
  6. Step 6: Final answer
    x = 838.72

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1.5x scale

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.