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Finding the Fourth Proportional to 1,373.93, 1,896.08 and 784.65

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Solution

The fourth proportional to 1,373.93, 1,896.08 and 784.65 is: 1,082.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,373.93 : 1,896.08 = 784.65 : x
  2. Step 2: Convert to fraction form
    1,373.93/1,896.08 = 784.65/x
  3. Step 3: Cross multiply
    1,373.93x = 1,896.08 × 784.65
  4. Step 4: Simplify right side
    1,373.93x = 1,487,759.17
  5. Step 5: Solve for x
    x = 1,487,759.17/1,373.93
  6. Step 6: Final answer
    x = 1,082.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.