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Finding the Fourth Proportional to 320.01, 479.47 and 288.89

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Solution

The fourth proportional to 320.01, 479.47 and 288.89 is: 432.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.01 : 479.47 = 288.89 : x
  2. Step 2: Convert to fraction form
    320.01/479.47 = 288.89/x
  3. Step 3: Cross multiply
    320.01x = 479.47 × 288.89
  4. Step 4: Simplify right side
    320.01x = 138,514.09
  5. Step 5: Solve for x
    x = 138,514.09/320.01
  6. Step 6: Final answer
    x = 432.84

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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.