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Finding the Fourth Proportional to 1,511.51, 2,265.16 and 816.68

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Solution

The fourth proportional to 1,511.51, 2,265.16 and 816.68 is: 1,223.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.51 : 2,265.16 = 816.68 : x
  2. Step 2: Convert to fraction form
    1,511.51/2,265.16 = 816.68/x
  3. Step 3: Cross multiply
    1,511.51x = 2,265.16 × 816.68
  4. Step 4: Simplify right side
    1,511.51x = 1,849,914.49
  5. Step 5: Solve for x
    x = 1,849,914.49/1,511.51
  6. Step 6: Final answer
    x = 1,223.88

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1.5x scale

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.