Home / 1,288,139.55-1,777,688.10-715,179.75

Finding the Fourth Proportional to 1,288,139.55, 1,777,688.10 and 715,179.75

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Solution

The fourth proportional to 1,288,139.55, 1,777,688.10 and 715,179.75 is: 986,978.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,139.55 : 1,777,688.10 = 715,179.75 : x
  2. Step 2: Convert to fraction form
    1,288,139.55/1,777,688.10 = 715,179.75/x
  3. Step 3: Cross multiply
    1,288,139.55x = 1,777,688.10 × 715,179.75
  4. Step 4: Simplify right side
    1,288,139.55x = 1,271,366,530,935.98
  5. Step 5: Solve for x
    x = 1,271,366,530,935.98/1,288,139.55
  6. Step 6: Final answer
    x = 986,978.88

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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.