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Finding the Fourth Proportional to 1,811.04, 2,715.54 and 715.11

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Solution

The fourth proportional to 1,811.04, 2,715.54 and 715.11 is: 1,072.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.04 : 2,715.54 = 715.11 : x
  2. Step 2: Convert to fraction form
    1,811.04/2,715.54 = 715.11/x
  3. Step 3: Cross multiply
    1,811.04x = 2,715.54 × 715.11
  4. Step 4: Simplify right side
    1,811.04x = 1,941,909.81
  5. Step 5: Solve for x
    x = 1,941,909.81/1,811.04
  6. Step 6: Final answer
    x = 1,072.26

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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.