Home / 1,123,384.80-1,685,077.20-645,087.90

Finding the Fourth Proportional to 1,123,384.80, 1,685,077.20 and 645,087.90

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Solution

The fourth proportional to 1,123,384.80, 1,685,077.20 and 645,087.90 is: 967,631.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123,384.80 : 1,685,077.20 = 645,087.90 : x
  2. Step 2: Convert to fraction form
    1,123,384.80/1,685,077.20 = 645,087.90/x
  3. Step 3: Cross multiply
    1,123,384.80x = 1,685,077.20 × 645,087.90
  4. Step 4: Simplify right side
    1,123,384.80x = 1,087,022,912,285.88
  5. Step 5: Solve for x
    x = 1,087,022,912,285.88/1,123,384.80
  6. Step 6: Final answer
    x = 967,631.85

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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.