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Finding the Fourth Proportional to 1,785.98, 2,679.23 and 553.49

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Solution

The fourth proportional to 1,785.98, 2,679.23 and 553.49 is: 830.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.98 : 2,679.23 = 553.49 : x
  2. Step 2: Convert to fraction form
    1,785.98/2,679.23 = 553.49/x
  3. Step 3: Cross multiply
    1,785.98x = 2,679.23 × 553.49
  4. Step 4: Simplify right side
    1,785.98x = 1,482,927.01
  5. Step 5: Solve for x
    x = 1,482,927.01/1,785.98
  6. Step 6: Final answer
    x = 830.32

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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.