Home / 743,065.79-1,025,439.75-420,767.60

Finding the Fourth Proportional to 743,065.79, 1,025,439.75 and 420,767.60

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Solution

The fourth proportional to 743,065.79, 1,025,439.75 and 420,767.60 is: 580,664.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,065.79 : 1,025,439.75 = 420,767.60 : x
  2. Step 2: Convert to fraction form
    743,065.79/1,025,439.75 = 420,767.60/x
  3. Step 3: Cross multiply
    743,065.79x = 1,025,439.75 × 420,767.60
  4. Step 4: Simplify right side
    743,065.79x = 431,471,817,424.90
  5. Step 5: Solve for x
    x = 431,471,817,424.90/743,065.79
  6. Step 6: Final answer
    x = 580,664.36

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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.