Home / 743,012.30-1,025,360.90-420,785.12

Finding the Fourth Proportional to 743,012.30, 1,025,360.90 and 420,785.12

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Solution

The fourth proportional to 743,012.30, 1,025,360.90 and 420,785.12 is: 580,685.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,012.30 : 1,025,360.90 = 420,785.12 : x
  2. Step 2: Convert to fraction form
    743,012.30/1,025,360.90 = 420,785.12/x
  3. Step 3: Cross multiply
    743,012.30x = 1,025,360.90 × 420,785.12
  4. Step 4: Simplify right side
    743,012.30x = 431,456,602,119.08
  5. Step 5: Solve for x
    x = 431,456,602,119.08/743,012.30
  6. Step 6: Final answer
    x = 580,685.68

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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.