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Finding the Fourth Proportional to 314.96, 472.20 and 288.20

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Solution

The fourth proportional to 314.96, 472.20 and 288.20 is: 432.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.96 : 472.20 = 288.20 : x
  2. Step 2: Convert to fraction form
    314.96/472.20 = 288.20/x
  3. Step 3: Cross multiply
    314.96x = 472.20 × 288.20
  4. Step 4: Simplify right side
    314.96x = 136,088.04
  5. Step 5: Solve for x
    x = 136,088.04/314.96
  6. Step 6: Final answer
    x = 432.08

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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.