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Finding the Fourth Proportional to 1,428.65, 2,145.10 and 883.11

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Solution

The fourth proportional to 1,428.65, 2,145.10 and 883.11 is: 1,325.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.65 : 2,145.10 = 883.11 : x
  2. Step 2: Convert to fraction form
    1,428.65/2,145.10 = 883.11/x
  3. Step 3: Cross multiply
    1,428.65x = 2,145.10 × 883.11
  4. Step 4: Simplify right side
    1,428.65x = 1,894,359.26
  5. Step 5: Solve for x
    x = 1,894,359.26/1,428.65
  6. Step 6: Final answer
    x = 1,325.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.