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Finding the Fourth Proportional to 805.84, 1,111.98 and 456.53

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Solution

The fourth proportional to 805.84, 1,111.98 and 456.53 is: 629.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.84 : 1,111.98 = 456.53 : x
  2. Step 2: Convert to fraction form
    805.84/1,111.98 = 456.53/x
  3. Step 3: Cross multiply
    805.84x = 1,111.98 × 456.53
  4. Step 4: Simplify right side
    805.84x = 507,646.67
  5. Step 5: Solve for x
    x = 507,646.67/805.84
  6. Step 6: Final answer
    x = 629.96

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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.