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Finding the Fourth Proportional to 1,140,840, 1,574,773.92 and 663,912

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Solution

The fourth proportional to 1,140,840, 1,574,773.92 and 663,912 is: 916,439.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140,840 : 1,574,773.92 = 663,912 : x
  2. Step 2: Convert to fraction form
    1,140,840/1,574,773.92 = 663,912/x
  3. Step 3: Cross multiply
    1,140,840x = 1,574,773.92 × 663,912
  4. Step 4: Simplify right side
    1,140,840x = 1,045,511,302,775.04
  5. Step 5: Solve for x
    x = 1,045,511,302,775.04/1,140,840
  6. Step 6: Final answer
    x = 916,439.91

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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.