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Finding the Fourth Proportional to 279.63, 417.60 and 256.59

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Solution

The fourth proportional to 279.63, 417.60 and 256.59 is: 383.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.63 : 417.60 = 256.59 : x
  2. Step 2: Convert to fraction form
    279.63/417.60 = 256.59/x
  3. Step 3: Cross multiply
    279.63x = 417.60 × 256.59
  4. Step 4: Simplify right side
    279.63x = 107,151.98
  5. Step 5: Solve for x
    x = 107,151.98/279.63
  6. Step 6: Final answer
    x = 383.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.