Home / 742,991.30-1,025,339.92-420,692.78

Finding the Fourth Proportional to 742,991.30, 1,025,339.92 and 420,692.78

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Solution

The fourth proportional to 742,991.30, 1,025,339.92 and 420,692.78 is: 580,562.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,991.30 : 1,025,339.92 = 420,692.78 : x
  2. Step 2: Convert to fraction form
    742,991.30/1,025,339.92 = 420,692.78/x
  3. Step 3: Cross multiply
    742,991.30x = 1,025,339.92 × 420,692.78
  4. Step 4: Simplify right side
    742,991.30x = 431,353,101,389.78
  5. Step 5: Solve for x
    x = 431,353,101,389.78/742,991.30
  6. Step 6: Final answer
    x = 580,562.79

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1.5x scale

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.