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Finding the Fourth Proportional to 651.75, 978.99 and 497.14

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Solution

The fourth proportional to 651.75, 978.99 and 497.14 is: 746.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.75 : 978.99 = 497.14 : x
  2. Step 2: Convert to fraction form
    651.75/978.99 = 497.14/x
  3. Step 3: Cross multiply
    651.75x = 978.99 × 497.14
  4. Step 4: Simplify right side
    651.75x = 486,690.78
  5. Step 5: Solve for x
    x = 486,690.78/651.75
  6. Step 6: Final answer
    x = 746.75

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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.