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Finding the Fourth Proportional to 356.79, 534.88 and 339.78

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Solution

The fourth proportional to 356.79, 534.88 and 339.78 is: 509.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.79 : 534.88 = 339.78 : x
  2. Step 2: Convert to fraction form
    356.79/534.88 = 339.78/x
  3. Step 3: Cross multiply
    356.79x = 534.88 × 339.78
  4. Step 4: Simplify right side
    356.79x = 181,741.95
  5. Step 5: Solve for x
    x = 181,741.95/356.79
  6. Step 6: Final answer
    x = 509.38

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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.