Home / 743,011.80-1,025,360.20-420,784.62

Finding the Fourth Proportional to 743,011.80, 1,025,360.20 and 420,784.62

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Solution

The fourth proportional to 743,011.80, 1,025,360.20 and 420,784.62 is: 580,684.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,011.80 : 1,025,360.20 = 420,784.62 : x
  2. Step 2: Convert to fraction form
    743,011.80/1,025,360.20 = 420,784.62/x
  3. Step 3: Cross multiply
    743,011.80x = 1,025,360.20 × 420,784.62
  4. Step 4: Simplify right side
    743,011.80x = 431,455,802,120.12
  5. Step 5: Solve for x
    x = 431,455,802,120.12/743,011.80
  6. Step 6: Final answer
    x = 580,684.99

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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.