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Finding the Fourth Proportional to 582.78, 804.15 and 346.74

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Solution

The fourth proportional to 582.78, 804.15 and 346.74 is: 478.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.78 : 804.15 = 346.74 : x
  2. Step 2: Convert to fraction form
    582.78/804.15 = 346.74/x
  3. Step 3: Cross multiply
    582.78x = 804.15 × 346.74
  4. Step 4: Simplify right side
    582.78x = 278,830.97
  5. Step 5: Solve for x
    x = 278,830.97/582.78
  6. Step 6: Final answer
    x = 478.45

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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.