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Finding the Fourth Proportional to 610.74, 916.45 and 286.07

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Solution

The fourth proportional to 610.74, 916.45 and 286.07 is: 429.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.74 : 916.45 = 286.07 : x
  2. Step 2: Convert to fraction form
    610.74/916.45 = 286.07/x
  3. Step 3: Cross multiply
    610.74x = 916.45 × 286.07
  4. Step 4: Simplify right side
    610.74x = 262,163.55
  5. Step 5: Solve for x
    x = 262,163.55/610.74
  6. Step 6: Final answer
    x = 429.26

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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.