Home / 391,313.30-539,996.94-221,547.42

Finding the Fourth Proportional to 391,313.30, 539,996.94 and 221,547.42

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Solution

The fourth proportional to 391,313.30, 539,996.94 and 221,547.42 is: 305,726.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,313.30 : 539,996.94 = 221,547.42 : x
  2. Step 2: Convert to fraction form
    391,313.30/539,996.94 = 221,547.42/x
  3. Step 3: Cross multiply
    391,313.30x = 539,996.94 × 221,547.42
  4. Step 4: Simplify right side
    391,313.30x = 119,634,928,864.90
  5. Step 5: Solve for x
    x = 119,634,928,864.90/391,313.30
  6. Step 6: Final answer
    x = 305,726.72

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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.