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Finding the Fourth Proportional to 1,333.10, 1,840.11 and 891.10

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Solution

The fourth proportional to 1,333.10, 1,840.11 and 891.10 is: 1,230.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333.10 : 1,840.11 = 891.10 : x
  2. Step 2: Convert to fraction form
    1,333.10/1,840.11 = 891.10/x
  3. Step 3: Cross multiply
    1,333.10x = 1,840.11 × 891.10
  4. Step 4: Simplify right side
    1,333.10x = 1,639,722.02
  5. Step 5: Solve for x
    x = 1,639,722.02/1,333.10
  6. Step 6: Final answer
    x = 1,230.01

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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.