Home / 725,678.28-1,001,448.04-399,005.12

Finding the Fourth Proportional to 725,678.28, 1,001,448.04 and 399,005.12

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Solution

The fourth proportional to 725,678.28, 1,001,448.04 and 399,005.12 is: 550,633.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,678.28 : 1,001,448.04 = 399,005.12 : x
  2. Step 2: Convert to fraction form
    725,678.28/1,001,448.04 = 399,005.12/x
  3. Step 3: Cross multiply
    725,678.28x = 1,001,448.04 × 399,005.12
  4. Step 4: Simplify right side
    725,678.28x = 399,582,895,373.97
  5. Step 5: Solve for x
    x = 399,582,895,373.97/725,678.28
  6. Step 6: Final answer
    x = 550,633.67

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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.