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Finding the Fourth Proportional to 659.97, 911.12 and 528.75

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Solution

The fourth proportional to 659.97, 911.12 and 528.75 is: 729.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.97 : 911.12 = 528.75 : x
  2. Step 2: Convert to fraction form
    659.97/911.12 = 528.75/x
  3. Step 3: Cross multiply
    659.97x = 911.12 × 528.75
  4. Step 4: Simplify right side
    659.97x = 481,752.06
  5. Step 5: Solve for x
    x = 481,752.06/659.97
  6. Step 6: Final answer
    x = 729.96

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Find fourth proportional to 329.99, 455.56 and 264.38
Half scale
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Double scale
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Similar ratio
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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.