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Finding the Fourth Proportional to 1,777,811.20, 2,664,643.20 and 712,326.40

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Solution

The fourth proportional to 1,777,811.20, 2,664,643.20 and 712,326.40 is: 1,067,658.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777,811.20 : 2,664,643.20 = 712,326.40 : x
  2. Step 2: Convert to fraction form
    1,777,811.20/2,664,643.20 = 712,326.40/x
  3. Step 3: Cross multiply
    1,777,811.20x = 2,664,643.20 × 712,326.40
  4. Step 4: Simplify right side
    1,777,811.20x = 1,898,095,697,940.48
  5. Step 5: Solve for x
    x = 1,898,095,697,940.48/1,777,811.20
  6. Step 6: Final answer
    x = 1,067,658.76

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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.