Home / 764,359.11-1,054,828.98-420,209.51

Finding the Fourth Proportional to 764,359.11, 1,054,828.98 and 420,209.51

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Solution

The fourth proportional to 764,359.11, 1,054,828.98 and 420,209.51 is: 579,896.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,359.11 : 1,054,828.98 = 420,209.51 : x
  2. Step 2: Convert to fraction form
    764,359.11/1,054,828.98 = 420,209.51/x
  3. Step 3: Cross multiply
    764,359.11x = 1,054,828.98 × 420,209.51
  4. Step 4: Simplify right side
    764,359.11x = 443,249,163,545.46
  5. Step 5: Solve for x
    x = 443,249,163,545.46/764,359.11
  6. Step 6: Final answer
    x = 579,896.49

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Double scale
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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.