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Finding the Fourth Proportional to 690.27, 950.65 and 572.75

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Solution

The fourth proportional to 690.27, 950.65 and 572.75 is: 788.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.27 : 950.65 = 572.75 : x
  2. Step 2: Convert to fraction form
    690.27/950.65 = 572.75/x
  3. Step 3: Cross multiply
    690.27x = 950.65 × 572.75
  4. Step 4: Simplify right side
    690.27x = 544,485.73
  5. Step 5: Solve for x
    x = 544,485.73/690.27
  6. Step 6: Final answer
    x = 788.80

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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.