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Finding the Fourth Proportional to 278.64, 384.71 and 237.65

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Solution

The fourth proportional to 278.64, 384.71 and 237.65 is: 328.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.64 : 384.71 = 237.65 : x
  2. Step 2: Convert to fraction form
    278.64/384.71 = 237.65/x
  3. Step 3: Cross multiply
    278.64x = 384.71 × 237.65
  4. Step 4: Simplify right side
    278.64x = 91,423.22
  5. Step 5: Solve for x
    x = 91,423.22/278.64
  6. Step 6: Final answer
    x = 328.11

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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.