Home / 764,981.55-1,055,668.71-420,810.07

Finding the Fourth Proportional to 764,981.55, 1,055,668.71 and 420,810.07

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Solution

The fourth proportional to 764,981.55, 1,055,668.71 and 420,810.07 is: 580,714.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,981.55 : 1,055,668.71 = 420,810.07 : x
  2. Step 2: Convert to fraction form
    764,981.55/1,055,668.71 = 420,810.07/x
  3. Step 3: Cross multiply
    764,981.55x = 1,055,668.71 × 420,810.07
  4. Step 4: Simplify right side
    764,981.55x = 444,236,023,751.91
  5. Step 5: Solve for x
    x = 444,236,023,751.91/764,981.55
  6. Step 6: Final answer
    x = 580,714.69

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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.