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Finding the Fourth Proportional to 738.05, 1,018.55 and 488.93

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Solution

The fourth proportional to 738.05, 1,018.55 and 488.93 is: 674.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.05 : 1,018.55 = 488.93 : x
  2. Step 2: Convert to fraction form
    738.05/1,018.55 = 488.93/x
  3. Step 3: Cross multiply
    738.05x = 1,018.55 × 488.93
  4. Step 4: Simplify right side
    738.05x = 497,999.65
  5. Step 5: Solve for x
    x = 497,999.65/738.05
  6. Step 6: Final answer
    x = 674.75

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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.