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Finding the Fourth Proportional to 846.78, 1,269.45 and 616.38

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Solution

The fourth proportional to 846.78, 1,269.45 and 616.38 is: 924.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.78 : 1,269.45 = 616.38 : x
  2. Step 2: Convert to fraction form
    846.78/1,269.45 = 616.38/x
  3. Step 3: Cross multiply
    846.78x = 1,269.45 × 616.38
  4. Step 4: Simplify right side
    846.78x = 782,463.59
  5. Step 5: Solve for x
    x = 782,463.59/846.78
  6. Step 6: Final answer
    x = 924.05

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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.