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Finding the Fourth Proportional to 501.84, 749.52 and 428.88

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Solution

The fourth proportional to 501.84, 749.52 and 428.88 is: 640.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.84 : 749.52 = 428.88 : x
  2. Step 2: Convert to fraction form
    501.84/749.52 = 428.88/x
  3. Step 3: Cross multiply
    501.84x = 749.52 × 428.88
  4. Step 4: Simplify right side
    501.84x = 321,454.14
  5. Step 5: Solve for x
    x = 321,454.14/501.84
  6. Step 6: Final answer
    x = 640.55

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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.