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Finding the Fourth Proportional to 1,266.48, 1,899.19 and 526.21

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Solution

The fourth proportional to 1,266.48, 1,899.19 and 526.21 is: 789.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.48 : 1,899.19 = 526.21 : x
  2. Step 2: Convert to fraction form
    1,266.48/1,899.19 = 526.21/x
  3. Step 3: Cross multiply
    1,266.48x = 1,899.19 × 526.21
  4. Step 4: Simplify right side
    1,266.48x = 999,366.71
  5. Step 5: Solve for x
    x = 999,366.71/1,266.48
  6. Step 6: Final answer
    x = 789.09

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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.