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Finding the Fourth Proportional to 472.80, 652.74 and 315.64

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Solution

The fourth proportional to 472.80, 652.74 and 315.64 is: 435.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.80 : 652.74 = 315.64 : x
  2. Step 2: Convert to fraction form
    472.80/652.74 = 315.64/x
  3. Step 3: Cross multiply
    472.80x = 652.74 × 315.64
  4. Step 4: Simplify right side
    472.80x = 206,030.85
  5. Step 5: Solve for x
    x = 206,030.85/472.80
  6. Step 6: Final answer
    x = 435.77

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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.