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Finding the Fourth Proportional to 803.30, 1,108.63 and 454.10

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Solution

The fourth proportional to 803.30, 1,108.63 and 454.10 is: 626.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.30 : 1,108.63 = 454.10 : x
  2. Step 2: Convert to fraction form
    803.30/1,108.63 = 454.10/x
  3. Step 3: Cross multiply
    803.30x = 1,108.63 × 454.10
  4. Step 4: Simplify right side
    803.30x = 503,422.20
  5. Step 5: Solve for x
    x = 503,422.20/803.30
  6. Step 6: Final answer
    x = 626.70

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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.