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Finding the Fourth Proportional to 1,319,123.25, 1,978,180.47 and 719,764.02

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Solution

The fourth proportional to 1,319,123.25, 1,978,180.47 and 719,764.02 is: 1,079,370.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,123.25 : 1,978,180.47 = 719,764.02 : x
  2. Step 2: Convert to fraction form
    1,319,123.25/1,978,180.47 = 719,764.02/x
  3. Step 3: Cross multiply
    1,319,123.25x = 1,978,180.47 × 719,764.02
  4. Step 4: Simplify right side
    1,319,123.25x = 1,423,823,127,372.69
  5. Step 5: Solve for x
    x = 1,423,823,127,372.69/1,319,123.25
  6. Step 6: Final answer
    x = 1,079,370.81

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.