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Finding the Fourth Proportional to 693,715.78, 957,331.61 and 387,805.05

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Solution

The fourth proportional to 693,715.78, 957,331.61 and 387,805.05 is: 535,173.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,715.78 : 957,331.61 = 387,805.05 : x
  2. Step 2: Convert to fraction form
    693,715.78/957,331.61 = 387,805.05/x
  3. Step 3: Cross multiply
    693,715.78x = 957,331.61 × 387,805.05
  4. Step 4: Simplify right side
    693,715.78x = 371,258,032,397.87
  5. Step 5: Solve for x
    x = 371,258,032,397.87/693,715.78
  6. Step 6: Final answer
    x = 535,173.11

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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.