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Finding the Fourth Proportional to 1,482.21, 2,223.51 and 557.85

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Solution

The fourth proportional to 1,482.21, 2,223.51 and 557.85 is: 836.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,482.21 : 2,223.51 = 557.85 : x
  2. Step 2: Convert to fraction form
    1,482.21/2,223.51 = 557.85/x
  3. Step 3: Cross multiply
    1,482.21x = 2,223.51 × 557.85
  4. Step 4: Simplify right side
    1,482.21x = 1,240,385.05
  5. Step 5: Solve for x
    x = 1,240,385.05/1,482.21
  6. Step 6: Final answer
    x = 836.85

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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.