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Finding the Fourth Proportional to 530.17, 790.78 and 499.68

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Solution

The fourth proportional to 530.17, 790.78 and 499.68 is: 745.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.17 : 790.78 = 499.68 : x
  2. Step 2: Convert to fraction form
    530.17/790.78 = 499.68/x
  3. Step 3: Cross multiply
    530.17x = 790.78 × 499.68
  4. Step 4: Simplify right side
    530.17x = 395,136.43
  5. Step 5: Solve for x
    x = 395,136.43/530.17
  6. Step 6: Final answer
    x = 745.31

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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.