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Finding the Fourth Proportional to 2,123.13, 3,184.73 and 807.49

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Solution

The fourth proportional to 2,123.13, 3,184.73 and 807.49 is: 1,211.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123.13 : 3,184.73 = 807.49 : x
  2. Step 2: Convert to fraction form
    2,123.13/3,184.73 = 807.49/x
  3. Step 3: Cross multiply
    2,123.13x = 3,184.73 × 807.49
  4. Step 4: Simplify right side
    2,123.13x = 2,571,637.63
  5. Step 5: Solve for x
    x = 2,571,637.63/2,123.13
  6. Step 6: Final answer
    x = 1,211.25

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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.