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Finding the Fourth Proportional to 613.24, 847.68 and 607.72

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Solution

The fourth proportional to 613.24, 847.68 and 607.72 is: 840.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.24 : 847.68 = 607.72 : x
  2. Step 2: Convert to fraction form
    613.24/847.68 = 607.72/x
  3. Step 3: Cross multiply
    613.24x = 847.68 × 607.72
  4. Step 4: Simplify right side
    613.24x = 515,152.09
  5. Step 5: Solve for x
    x = 515,152.09/613.24
  6. Step 6: Final answer
    x = 840.05

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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.