Home / 642,739.20-963,187.20-472,934.40

Finding the Fourth Proportional to 642,739.20, 963,187.20 and 472,934.40

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Solution

The fourth proportional to 642,739.20, 963,187.20 and 472,934.40 is: 708,723.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,739.20 : 963,187.20 = 472,934.40 : x
  2. Step 2: Convert to fraction form
    642,739.20/963,187.20 = 472,934.40/x
  3. Step 3: Cross multiply
    642,739.20x = 963,187.20 × 472,934.40
  4. Step 4: Simplify right side
    642,739.20x = 455,524,360,519.68
  5. Step 5: Solve for x
    x = 455,524,360,519.68/642,739.20
  6. Step 6: Final answer
    x = 708,723.48

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1.5x scale

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.