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Finding the Fourth Proportional to 628.16, 935.76 and 609.04

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Solution

The fourth proportional to 628.16, 935.76 and 609.04 is: 907.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.16 : 935.76 = 609.04 : x
  2. Step 2: Convert to fraction form
    628.16/935.76 = 609.04/x
  3. Step 3: Cross multiply
    628.16x = 935.76 × 609.04
  4. Step 4: Simplify right side
    628.16x = 569,915.27
  5. Step 5: Solve for x
    x = 569,915.27/628.16
  6. Step 6: Final answer
    x = 907.28

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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.