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Finding the Fourth Proportional to 716.14, 987.69 and 483.22

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Solution

The fourth proportional to 716.14, 987.69 and 483.22 is: 666.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.14 : 987.69 = 483.22 : x
  2. Step 2: Convert to fraction form
    716.14/987.69 = 483.22/x
  3. Step 3: Cross multiply
    716.14x = 987.69 × 483.22
  4. Step 4: Simplify right side
    716.14x = 477,271.56
  5. Step 5: Solve for x
    x = 477,271.56/716.14
  6. Step 6: Final answer
    x = 666.45

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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.