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Finding the Fourth Proportional to 530.79, 793.71 and 392.49

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Solution

The fourth proportional to 530.79, 793.71 and 392.49 is: 586.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.79 : 793.71 = 392.49 : x
  2. Step 2: Convert to fraction form
    530.79/793.71 = 392.49/x
  3. Step 3: Cross multiply
    530.79x = 793.71 × 392.49
  4. Step 4: Simplify right side
    530.79x = 311,523.24
  5. Step 5: Solve for x
    x = 311,523.24/530.79
  6. Step 6: Final answer
    x = 586.90

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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.