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Finding the Fourth Proportional to 690.75, 952.20 and 504.45

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Solution

The fourth proportional to 690.75, 952.20 and 504.45 is: 695.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.75 : 952.20 = 504.45 : x
  2. Step 2: Convert to fraction form
    690.75/952.20 = 504.45/x
  3. Step 3: Cross multiply
    690.75x = 952.20 × 504.45
  4. Step 4: Simplify right side
    690.75x = 480,337.29
  5. Step 5: Solve for x
    x = 480,337.29/690.75
  6. Step 6: Final answer
    x = 695.39

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Double scale
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1.5x scale

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.