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Finding the Fourth Proportional to 803.47, 1,108.59 and 454.15

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Solution

The fourth proportional to 803.47, 1,108.59 and 454.15 is: 626.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.47 : 1,108.59 = 454.15 : x
  2. Step 2: Convert to fraction form
    803.47/1,108.59 = 454.15/x
  3. Step 3: Cross multiply
    803.47x = 1,108.59 × 454.15
  4. Step 4: Simplify right side
    803.47x = 503,466.15
  5. Step 5: Solve for x
    x = 503,466.15/803.47
  6. Step 6: Final answer
    x = 626.61

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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.