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Finding the Fourth Proportional to 348.13, 478.95 and 339.93

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Solution

The fourth proportional to 348.13, 478.95 and 339.93 is: 467.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.13 : 478.95 = 339.93 : x
  2. Step 2: Convert to fraction form
    348.13/478.95 = 339.93/x
  3. Step 3: Cross multiply
    348.13x = 478.95 × 339.93
  4. Step 4: Simplify right side
    348.13x = 162,808.20
  5. Step 5: Solve for x
    x = 162,808.20/348.13
  6. Step 6: Final answer
    x = 467.66

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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.