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Finding the Fourth Proportional to 660.36, 909.18 and 572.52

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Solution

The fourth proportional to 660.36, 909.18 and 572.52 is: 788.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.36 : 909.18 = 572.52 : x
  2. Step 2: Convert to fraction form
    660.36/909.18 = 572.52/x
  3. Step 3: Cross multiply
    660.36x = 909.18 × 572.52
  4. Step 4: Simplify right side
    660.36x = 520,523.73
  5. Step 5: Solve for x
    x = 520,523.73/660.36
  6. Step 6: Final answer
    x = 788.24

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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.