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Finding the Fourth Proportional to 573.47, 790.91 and 499.65

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Solution

The fourth proportional to 573.47, 790.91 and 499.65 is: 689.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.47 : 790.91 = 499.65 : x
  2. Step 2: Convert to fraction form
    573.47/790.91 = 499.65/x
  3. Step 3: Cross multiply
    573.47x = 790.91 × 499.65
  4. Step 4: Simplify right side
    573.47x = 395,175.68
  5. Step 5: Solve for x
    x = 395,175.68/573.47
  6. Step 6: Final answer
    x = 689.10

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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.