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Finding the Fourth Proportional to 1,511.86, 2,267.79 and 471.86

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Solution

The fourth proportional to 1,511.86, 2,267.79 and 471.86 is: 707.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.86 : 2,267.79 = 471.86 : x
  2. Step 2: Convert to fraction form
    1,511.86/2,267.79 = 471.86/x
  3. Step 3: Cross multiply
    1,511.86x = 2,267.79 × 471.86
  4. Step 4: Simplify right side
    1,511.86x = 1,070,079.39
  5. Step 5: Solve for x
    x = 1,070,079.39/1,511.86
  6. Step 6: Final answer
    x = 707.79

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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.