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Finding the Fourth Proportional to 1,378.07, 1,902.18 and 882.05

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Solution

The fourth proportional to 1,378.07, 1,902.18 and 882.05 is: 1,217.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.07 : 1,902.18 = 882.05 : x
  2. Step 2: Convert to fraction form
    1,378.07/1,902.18 = 882.05/x
  3. Step 3: Cross multiply
    1,378.07x = 1,902.18 × 882.05
  4. Step 4: Simplify right side
    1,378.07x = 1,677,808.36
  5. Step 5: Solve for x
    x = 1,677,808.36/1,378.07
  6. Step 6: Final answer
    x = 1,217.51

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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.