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Finding the Fourth Proportional to 849.38, 1,172.16 and 555.17

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Solution

The fourth proportional to 849.38, 1,172.16 and 555.17 is: 766.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.38 : 1,172.16 = 555.17 : x
  2. Step 2: Convert to fraction form
    849.38/1,172.16 = 555.17/x
  3. Step 3: Cross multiply
    849.38x = 1,172.16 × 555.17
  4. Step 4: Simplify right side
    849.38x = 650,742.21
  5. Step 5: Solve for x
    x = 650,742.21/849.38
  6. Step 6: Final answer
    x = 766.14

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Double scale
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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.