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Finding the Fourth Proportional to 314.45, 469.37 and 291.28

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Solution

The fourth proportional to 314.45, 469.37 and 291.28 is: 434.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.45 : 469.37 = 291.28 : x
  2. Step 2: Convert to fraction form
    314.45/469.37 = 291.28/x
  3. Step 3: Cross multiply
    314.45x = 469.37 × 291.28
  4. Step 4: Simplify right side
    314.45x = 136,717.22
  5. Step 5: Solve for x
    x = 136,717.22/314.45
  6. Step 6: Final answer
    x = 434.79

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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.