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Finding the Fourth Proportional to 612.79, 914.68 and 539.89

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Solution

The fourth proportional to 612.79, 914.68 and 539.89 is: 805.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.79 : 914.68 = 539.89 : x
  2. Step 2: Convert to fraction form
    612.79/914.68 = 539.89/x
  3. Step 3: Cross multiply
    612.79x = 914.68 × 539.89
  4. Step 4: Simplify right side
    612.79x = 493,826.59
  5. Step 5: Solve for x
    x = 493,826.59/612.79
  6. Step 6: Final answer
    x = 805.87

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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.