Home / 725,979.81-1,001,880.71-399,323.21

Finding the Fourth Proportional to 725,979.81, 1,001,880.71 and 399,323.21

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Solution

The fourth proportional to 725,979.81, 1,001,880.71 and 399,323.21 is: 551,081.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,979.81 : 1,001,880.71 = 399,323.21 : x
  2. Step 2: Convert to fraction form
    725,979.81/1,001,880.71 = 399,323.21/x
  3. Step 3: Cross multiply
    725,979.81x = 1,001,880.71 × 399,323.21
  4. Step 4: Simplify right side
    725,979.81x = 400,074,220,709.70
  5. Step 5: Solve for x
    x = 400,074,220,709.70/725,979.81
  6. Step 6: Final answer
    x = 551,081.75

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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.