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Finding the Third Proportional to 478.55 and 703.13

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Solution

The third proportional to 478.55 and 703.13 is: 1,033.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.55 : 703.13 = 703.13 : x
  2. Step 2: Convert to fraction form
    478.55/703.13 = 703.13/x
  3. Step 3: Cross multiply
    478.55x = 703.13 × 703.13
  4. Step 4: Simplify right side
    478.55x = 494,384.77
  5. Step 5: Solve for x
    x = 494,384.77/478.55
  6. Step 6: Final answer
    x = 1,033.10

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.