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Finding the Fourth Proportional to 651.90, 979.35 and 616.93

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Solution

The fourth proportional to 651.90, 979.35 and 616.93 is: 926.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.90 : 979.35 = 616.93 : x
  2. Step 2: Convert to fraction form
    651.90/979.35 = 616.93/x
  3. Step 3: Cross multiply
    651.90x = 979.35 × 616.93
  4. Step 4: Simplify right side
    651.90x = 604,190.40
  5. Step 5: Solve for x
    x = 604,190.40/651.90
  6. Step 6: Final answer
    x = 926.81

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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.