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Finding the Fourth Proportional to 472.40, 652.01 and 315.30

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Solution

The fourth proportional to 472.40, 652.01 and 315.30 is: 435.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.40 : 652.01 = 315.30 : x
  2. Step 2: Convert to fraction form
    472.40/652.01 = 315.30/x
  3. Step 3: Cross multiply
    472.40x = 652.01 × 315.30
  4. Step 4: Simplify right side
    472.40x = 205,578.75
  5. Step 5: Solve for x
    x = 205,578.75/472.40
  6. Step 6: Final answer
    x = 435.18

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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.