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Finding the Fourth Proportional to 709.62, 1,065.15 and 549.06

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Solution

The fourth proportional to 709.62, 1,065.15 and 549.06 is: 824.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.62 : 1,065.15 = 549.06 : x
  2. Step 2: Convert to fraction form
    709.62/1,065.15 = 549.06/x
  3. Step 3: Cross multiply
    709.62x = 1,065.15 × 549.06
  4. Step 4: Simplify right side
    709.62x = 584,831.26
  5. Step 5: Solve for x
    x = 584,831.26/709.62
  6. Step 6: Final answer
    x = 824.15

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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.