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Finding the Fourth Proportional to 805.22, 1,111.59 and 569.66

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Solution

The fourth proportional to 805.22, 1,111.59 and 569.66 is: 786.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.22 : 1,111.59 = 569.66 : x
  2. Step 2: Convert to fraction form
    805.22/1,111.59 = 569.66/x
  3. Step 3: Cross multiply
    805.22x = 1,111.59 × 569.66
  4. Step 4: Simplify right side
    805.22x = 633,228.36
  5. Step 5: Solve for x
    x = 633,228.36/805.22
  6. Step 6: Final answer
    x = 786.40

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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.