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Finding the Fourth Proportional to 634.80, 874.62 and 529.50

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Solution

The fourth proportional to 634.80, 874.62 and 529.50 is: 729.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.80 : 874.62 = 529.50 : x
  2. Step 2: Convert to fraction form
    634.80/874.62 = 529.50/x
  3. Step 3: Cross multiply
    634.80x = 874.62 × 529.50
  4. Step 4: Simplify right side
    634.80x = 463,111.29
  5. Step 5: Solve for x
    x = 463,111.29/634.80
  6. Step 6: Final answer
    x = 729.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.