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Finding the Fourth Proportional to 1,607.07, 2,217.75 and 871.07

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Solution

The fourth proportional to 1,607.07, 2,217.75 and 871.07 is: 1,202.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,607.07 : 2,217.75 = 871.07 : x
  2. Step 2: Convert to fraction form
    1,607.07/2,217.75 = 871.07/x
  3. Step 3: Cross multiply
    1,607.07x = 2,217.75 × 871.07
  4. Step 4: Simplify right side
    1,607.07x = 1,931,815.49
  5. Step 5: Solve for x
    x = 1,931,815.49/1,607.07
  6. Step 6: Final answer
    x = 1,202.07

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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.