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Finding the Fourth Proportional to 356.04, 489.83 and 347.85

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Solution

The fourth proportional to 356.04, 489.83 and 347.85 is: 478.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.04 : 489.83 = 347.85 : x
  2. Step 2: Convert to fraction form
    356.04/489.83 = 347.85/x
  3. Step 3: Cross multiply
    356.04x = 489.83 × 347.85
  4. Step 4: Simplify right side
    356.04x = 170,385.63
  5. Step 5: Solve for x
    x = 170,385.63/356.04
  6. Step 6: Final answer
    x = 478.56

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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.