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Finding the Fourth Proportional to 472.90, 652.48 and 315.36

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Solution

The fourth proportional to 472.90, 652.48 and 315.36 is: 435.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.90 : 652.48 = 315.36 : x
  2. Step 2: Convert to fraction form
    472.90/652.48 = 315.36/x
  3. Step 3: Cross multiply
    472.90x = 652.48 × 315.36
  4. Step 4: Simplify right side
    472.90x = 205,766.09
  5. Step 5: Solve for x
    x = 205,766.09/472.90
  6. Step 6: Final answer
    x = 435.12

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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.