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Finding the Fourth Proportional to 529.82, 790.95 and 456.70

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Solution

The fourth proportional to 529.82, 790.95 and 456.70 is: 681.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.82 : 790.95 = 456.70 : x
  2. Step 2: Convert to fraction form
    529.82/790.95 = 456.70/x
  3. Step 3: Cross multiply
    529.82x = 790.95 × 456.70
  4. Step 4: Simplify right side
    529.82x = 361,226.87
  5. Step 5: Solve for x
    x = 361,226.87/529.82
  6. Step 6: Final answer
    x = 681.79

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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.