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Finding the Fourth Proportional to 1,008.47, 1,511.70 and 926.46

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Solution

The fourth proportional to 1,008.47, 1,511.70 and 926.46 is: 1,388.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.47 : 1,511.70 = 926.46 : x
  2. Step 2: Convert to fraction form
    1,008.47/1,511.70 = 926.46/x
  3. Step 3: Cross multiply
    1,008.47x = 1,511.70 × 926.46
  4. Step 4: Simplify right side
    1,008.47x = 1,400,529.58
  5. Step 5: Solve for x
    x = 1,400,529.58/1,008.47
  6. Step 6: Final answer
    x = 1,388.77

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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.