Home / 725,265.64-1,000,806.42-398,561.47

Finding the Fourth Proportional to 725,265.64, 1,000,806.42 and 398,561.47

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Solution

The fourth proportional to 725,265.64, 1,000,806.42 and 398,561.47 is: 549,981.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,265.64 : 1,000,806.42 = 398,561.47 : x
  2. Step 2: Convert to fraction form
    725,265.64/1,000,806.42 = 398,561.47/x
  3. Step 3: Cross multiply
    725,265.64x = 1,000,806.42 × 398,561.47
  4. Step 4: Simplify right side
    725,265.64x = 398,882,875,438.62
  5. Step 5: Solve for x
    x = 398,882,875,438.62/725,265.64
  6. Step 6: Final answer
    x = 549,981.77

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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.