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Finding the Fourth Proportional to 805.80, 1,111.82 and 474.24

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Solution

The fourth proportional to 805.80, 1,111.82 and 474.24 is: 654.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.80 : 1,111.82 = 474.24 : x
  2. Step 2: Convert to fraction form
    805.80/1,111.82 = 474.24/x
  3. Step 3: Cross multiply
    805.80x = 1,111.82 × 474.24
  4. Step 4: Simplify right side
    805.80x = 527,267.15
  5. Step 5: Solve for x
    x = 527,267.15/805.80
  6. Step 6: Final answer
    x = 654.34

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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.