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Finding the Fourth Proportional to 1,126.84, 1,688.64 and 476.68

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Solution

The fourth proportional to 1,126.84, 1,688.64 and 476.68 is: 714.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.84 : 1,688.64 = 476.68 : x
  2. Step 2: Convert to fraction form
    1,126.84/1,688.64 = 476.68/x
  3. Step 3: Cross multiply
    1,126.84x = 1,688.64 × 476.68
  4. Step 4: Simplify right side
    1,126.84x = 804,940.92
  5. Step 5: Solve for x
    x = 804,940.92/1,126.84
  6. Step 6: Final answer
    x = 714.33

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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.