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Finding the Fourth Proportional to 851.52, 1,175.07 and 478.52

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Solution

The fourth proportional to 851.52, 1,175.07 and 478.52 is: 660.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.52 : 1,175.07 = 478.52 : x
  2. Step 2: Convert to fraction form
    851.52/1,175.07 = 478.52/x
  3. Step 3: Cross multiply
    851.52x = 1,175.07 × 478.52
  4. Step 4: Simplify right side
    851.52x = 562,288.62
  5. Step 5: Solve for x
    x = 562,288.62/851.52
  6. Step 6: Final answer
    x = 660.34

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1.5x scale

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.