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Finding the Fourth Proportional to 1,779.70, 2,669.94 and 547.28

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Solution

The fourth proportional to 1,779.70, 2,669.94 and 547.28 is: 821.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.70 : 2,669.94 = 547.28 : x
  2. Step 2: Convert to fraction form
    1,779.70/2,669.94 = 547.28/x
  3. Step 3: Cross multiply
    1,779.70x = 2,669.94 × 547.28
  4. Step 4: Simplify right side
    1,779.70x = 1,461,204.76
  5. Step 5: Solve for x
    x = 1,461,204.76/1,779.70
  6. Step 6: Final answer
    x = 821.04

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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.