Home / 678,869.41-936,735.64-392,334.16

Finding the Fourth Proportional to 678,869.41, 936,735.64 and 392,334.16

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Solution

The fourth proportional to 678,869.41, 936,735.64 and 392,334.16 is: 541,360.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,869.41 : 936,735.64 = 392,334.16 : x
  2. Step 2: Convert to fraction form
    678,869.41/936,735.64 = 392,334.16/x
  3. Step 3: Cross multiply
    678,869.41x = 936,735.64 × 392,334.16
  4. Step 4: Simplify right side
    678,869.41x = 367,513,390,461.46
  5. Step 5: Solve for x
    x = 367,513,390,461.46/678,869.41
  6. Step 6: Final answer
    x = 541,360.95

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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.