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Finding the Fourth Proportional to 805.37, 1,111.29 and 469.18

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Solution

The fourth proportional to 805.37, 1,111.29 and 469.18 is: 647.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.37 : 1,111.29 = 469.18 : x
  2. Step 2: Convert to fraction form
    805.37/1,111.29 = 469.18/x
  3. Step 3: Cross multiply
    805.37x = 1,111.29 × 469.18
  4. Step 4: Simplify right side
    805.37x = 521,392.26
  5. Step 5: Solve for x
    x = 521,392.26/805.37
  6. Step 6: Final answer
    x = 647.40

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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.