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Finding the Fourth Proportional to 803.70, 1,108.98 and 454.32

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Solution

The fourth proportional to 803.70, 1,108.98 and 454.32 is: 626.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.70 : 1,108.98 = 454.32 : x
  2. Step 2: Convert to fraction form
    803.70/1,108.98 = 454.32/x
  3. Step 3: Cross multiply
    803.70x = 1,108.98 × 454.32
  4. Step 4: Simplify right side
    803.70x = 503,831.79
  5. Step 5: Solve for x
    x = 503,831.79/803.70
  6. Step 6: Final answer
    x = 626.89

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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.