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Finding the Fourth Proportional to 607.89, 909.71 and 561.12

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Solution

The fourth proportional to 607.89, 909.71 and 561.12 is: 839.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.89 : 909.71 = 561.12 : x
  2. Step 2: Convert to fraction form
    607.89/909.71 = 561.12/x
  3. Step 3: Cross multiply
    607.89x = 909.71 × 561.12
  4. Step 4: Simplify right side
    607.89x = 510,456.48
  5. Step 5: Solve for x
    x = 510,456.48/607.89
  6. Step 6: Final answer
    x = 839.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.