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Finding the Fourth Proportional to 690.57, 951.57 and 572.19

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Solution

The fourth proportional to 690.57, 951.57 and 572.19 is: 788.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.57 : 951.57 = 572.19 : x
  2. Step 2: Convert to fraction form
    690.57/951.57 = 572.19/x
  3. Step 3: Cross multiply
    690.57x = 951.57 × 572.19
  4. Step 4: Simplify right side
    690.57x = 544,478.84
  5. Step 5: Solve for x
    x = 544,478.84/690.57
  6. Step 6: Final answer
    x = 788.45

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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.