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Finding the Fourth Proportional to 259.76, 358.50 and 156.28

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Solution

The fourth proportional to 259.76, 358.50 and 156.28 is: 215.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.76 : 358.50 = 156.28 : x
  2. Step 2: Convert to fraction form
    259.76/358.50 = 156.28/x
  3. Step 3: Cross multiply
    259.76x = 358.50 × 156.28
  4. Step 4: Simplify right side
    259.76x = 56,026.38
  5. Step 5: Solve for x
    x = 56,026.38/259.76
  6. Step 6: Final answer
    x = 215.69

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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.