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Finding the Fourth Proportional to 530.80, 790.62 and 523.60

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Solution

The fourth proportional to 530.80, 790.62 and 523.60 is: 779.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.80 : 790.62 = 523.60 : x
  2. Step 2: Convert to fraction form
    530.80/790.62 = 523.60/x
  3. Step 3: Cross multiply
    530.80x = 790.62 × 523.60
  4. Step 4: Simplify right side
    530.80x = 413,964.69
  5. Step 5: Solve for x
    x = 413,964.69/530.80
  6. Step 6: Final answer
    x = 779.89

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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.