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Finding the Fourth Proportional to 711.42, 981.25 and 549.13

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Solution

The fourth proportional to 711.42, 981.25 and 549.13 is: 757.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.42 : 981.25 = 549.13 : x
  2. Step 2: Convert to fraction form
    711.42/981.25 = 549.13/x
  3. Step 3: Cross multiply
    711.42x = 981.25 × 549.13
  4. Step 4: Simplify right side
    711.42x = 538,831.07
  5. Step 5: Solve for x
    x = 538,831.07/711.42
  6. Step 6: Final answer
    x = 757.40

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Double scale
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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.