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Finding the Fourth Proportional to 762.30, 1,145.28 and 488.93

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Solution

The fourth proportional to 762.30, 1,145.28 and 488.93 is: 734.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.30 : 1,145.28 = 488.93 : x
  2. Step 2: Convert to fraction form
    762.30/1,145.28 = 488.93/x
  3. Step 3: Cross multiply
    762.30x = 1,145.28 × 488.93
  4. Step 4: Simplify right side
    762.30x = 559,960.32
  5. Step 5: Solve for x
    x = 559,960.32/762.30
  6. Step 6: Final answer
    x = 734.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.