Home / 870,867.70-1,306,384-338,429.78

Finding the Fourth Proportional to 870,867.70, 1,306,384 and 338,429.78

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Solution

The fourth proportional to 870,867.70, 1,306,384 and 338,429.78 is: 507,676.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,867.70 : 1,306,384 = 338,429.78 : x
  2. Step 2: Convert to fraction form
    870,867.70/1,306,384 = 338,429.78/x
  3. Step 3: Cross multiply
    870,867.70x = 1,306,384 × 338,429.78
  4. Step 4: Simplify right side
    870,867.70x = 442,119,249,715.52
  5. Step 5: Solve for x
    x = 442,119,249,715.52/870,867.70
  6. Step 6: Final answer
    x = 507,676.71

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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.