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Finding the Fourth Proportional to 610.78, 916.68 and 572.34

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Solution

The fourth proportional to 610.78, 916.68 and 572.34 is: 858.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.78 : 916.68 = 572.34 : x
  2. Step 2: Convert to fraction form
    610.78/916.68 = 572.34/x
  3. Step 3: Cross multiply
    610.78x = 916.68 × 572.34
  4. Step 4: Simplify right side
    610.78x = 524,648.05
  5. Step 5: Solve for x
    x = 524,648.05/610.78
  6. Step 6: Final answer
    x = 858.98

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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.