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Finding the Fourth Proportional to 561.48, 842.38 and 497.80

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Solution

The fourth proportional to 561.48, 842.38 and 497.80 is: 746.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.48 : 842.38 = 497.80 : x
  2. Step 2: Convert to fraction form
    561.48/842.38 = 497.80/x
  3. Step 3: Cross multiply
    561.48x = 842.38 × 497.80
  4. Step 4: Simplify right side
    561.48x = 419,336.76
  5. Step 5: Solve for x
    x = 419,336.76/561.48
  6. Step 6: Final answer
    x = 746.84

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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.