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Finding the Fourth Proportional to 578.60, 798.65 and 342.53

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Solution

The fourth proportional to 578.60, 798.65 and 342.53 is: 472.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.60 : 798.65 = 342.53 : x
  2. Step 2: Convert to fraction form
    578.60/798.65 = 342.53/x
  3. Step 3: Cross multiply
    578.60x = 798.65 × 342.53
  4. Step 4: Simplify right side
    578.60x = 273,561.58
  5. Step 5: Solve for x
    x = 273,561.58/578.60
  6. Step 6: Final answer
    x = 472.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.