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Finding the Fourth Proportional to 568.60, 856.55 and 561.42

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Solution

The fourth proportional to 568.60, 856.55 and 561.42 is: 845.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.60 : 856.55 = 561.42 : x
  2. Step 2: Convert to fraction form
    568.60/856.55 = 561.42/x
  3. Step 3: Cross multiply
    568.60x = 856.55 × 561.42
  4. Step 4: Simplify right side
    568.60x = 480,885.70
  5. Step 5: Solve for x
    x = 480,885.70/568.60
  6. Step 6: Final answer
    x = 845.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.