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Finding the Fourth Proportional to 1,359.65, 2,037.94 and 810.70

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Solution

The fourth proportional to 1,359.65, 2,037.94 and 810.70 is: 1,215.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.65 : 2,037.94 = 810.70 : x
  2. Step 2: Convert to fraction form
    1,359.65/2,037.94 = 810.70/x
  3. Step 3: Cross multiply
    1,359.65x = 2,037.94 × 810.70
  4. Step 4: Simplify right side
    1,359.65x = 1,652,150.84
  5. Step 5: Solve for x
    x = 1,652,150.84/1,359.65
  6. Step 6: Final answer
    x = 1,215.13

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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.