Home / 678,721.28-936,531.06-392,185.76

Finding the Fourth Proportional to 678,721.28, 936,531.06 and 392,185.76

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Solution

The fourth proportional to 678,721.28, 936,531.06 and 392,185.76 is: 541,156.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,721.28 : 936,531.06 = 392,185.76 : x
  2. Step 2: Convert to fraction form
    678,721.28/936,531.06 = 392,185.76/x
  3. Step 3: Cross multiply
    678,721.28x = 936,531.06 × 392,185.76
  4. Step 4: Simplify right side
    678,721.28x = 367,294,145,529.71
  5. Step 5: Solve for x
    x = 367,294,145,529.71/678,721.28
  6. Step 6: Final answer
    x = 541,156.08

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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.