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Finding the Fourth Proportional to 691,725.72, 954,572.94 and 389,919.72

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Solution

The fourth proportional to 691,725.72, 954,572.94 and 389,919.72 is: 538,084.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,725.72 : 954,572.94 = 389,919.72 : x
  2. Step 2: Convert to fraction form
    691,725.72/954,572.94 = 389,919.72/x
  3. Step 3: Cross multiply
    691,725.72x = 954,572.94 × 389,919.72
  4. Step 4: Simplify right side
    691,725.72x = 372,206,813,484.38
  5. Step 5: Solve for x
    x = 372,206,813,484.38/691,725.72
  6. Step 6: Final answer
    x = 538,084.39

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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.