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Finding the Fourth Proportional to 611.93, 916.78 and 283.14

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Solution

The fourth proportional to 611.93, 916.78 and 283.14 is: 424.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.93 : 916.78 = 283.14 : x
  2. Step 2: Convert to fraction form
    611.93/916.78 = 283.14/x
  3. Step 3: Cross multiply
    611.93x = 916.78 × 283.14
  4. Step 4: Simplify right side
    611.93x = 259,577.09
  5. Step 5: Solve for x
    x = 259,577.09/611.93
  6. Step 6: Final answer
    x = 424.19

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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.