Home / 764,309.68-1,054,760.47-420,160.12

Finding the Fourth Proportional to 764,309.68, 1,054,760.47 and 420,160.12

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Solution

The fourth proportional to 764,309.68, 1,054,760.47 and 420,160.12 is: 579,828.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,309.68 : 1,054,760.47 = 420,160.12 : x
  2. Step 2: Convert to fraction form
    764,309.68/1,054,760.47 = 420,160.12/x
  3. Step 3: Cross multiply
    764,309.68x = 1,054,760.47 × 420,160.12
  4. Step 4: Simplify right side
    764,309.68x = 443,168,281,959.16
  5. Step 5: Solve for x
    x = 443,168,281,959.16/764,309.68
  6. Step 6: Final answer
    x = 579,828.17

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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.