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Finding the Fourth Proportional to 710.22, 1,065.64 and 549.30

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Solution

The fourth proportional to 710.22, 1,065.64 and 549.30 is: 824.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.22 : 1,065.64 = 549.30 : x
  2. Step 2: Convert to fraction form
    710.22/1,065.64 = 549.30/x
  3. Step 3: Cross multiply
    710.22x = 1,065.64 × 549.30
  4. Step 4: Simplify right side
    710.22x = 585,356.05
  5. Step 5: Solve for x
    x = 585,356.05/710.22
  6. Step 6: Final answer
    x = 824.19

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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.