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Finding the Fourth Proportional to 1,266.84, 1,901.05 and 486.91

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Solution

The fourth proportional to 1,266.84, 1,901.05 and 486.91 is: 730.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.84 : 1,901.05 = 486.91 : x
  2. Step 2: Convert to fraction form
    1,266.84/1,901.05 = 486.91/x
  3. Step 3: Cross multiply
    1,266.84x = 1,901.05 × 486.91
  4. Step 4: Simplify right side
    1,266.84x = 925,628.32
  5. Step 5: Solve for x
    x = 925,628.32/1,266.84
  6. Step 6: Final answer
    x = 730.66

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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.