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Finding the Fourth Proportional to 314.64, 472.40 and 223.92

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Solution

The fourth proportional to 314.64, 472.40 and 223.92 is: 336.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.64 : 472.40 = 223.92 : x
  2. Step 2: Convert to fraction form
    314.64/472.40 = 223.92/x
  3. Step 3: Cross multiply
    314.64x = 472.40 × 223.92
  4. Step 4: Simplify right side
    314.64x = 105,779.81
  5. Step 5: Solve for x
    x = 105,779.81/314.64
  6. Step 6: Final answer
    x = 336.19

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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.