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Finding the Fourth Proportional to 1,942,811.48, 2,912,452.98 and 679,950.20

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Solution

The fourth proportional to 1,942,811.48, 2,912,452.98 and 679,950.20 is: 1,019,307.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942,811.48 : 2,912,452.98 = 679,950.20 : x
  2. Step 2: Convert to fraction form
    1,942,811.48/2,912,452.98 = 679,950.20/x
  3. Step 3: Cross multiply
    1,942,811.48x = 2,912,452.98 × 679,950.20
  4. Step 4: Simplify right side
    1,942,811.48x = 1,980,322,986,241.60
  5. Step 5: Solve for x
    x = 1,980,322,986,241.60/1,942,811.48
  6. Step 6: Final answer
    x = 1,019,307.85

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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.