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Finding the Fourth Proportional to 688,915.28, 950,708.16 and 378,823.28

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Solution

The fourth proportional to 688,915.28, 950,708.16 and 378,823.28 is: 522,778.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,915.28 : 950,708.16 = 378,823.28 : x
  2. Step 2: Convert to fraction form
    688,915.28/950,708.16 = 378,823.28/x
  3. Step 3: Cross multiply
    688,915.28x = 950,708.16 × 378,823.28
  4. Step 4: Simplify right side
    688,915.28x = 360,150,383,493.97
  5. Step 5: Solve for x
    x = 360,150,383,493.97/688,915.28
  6. Step 6: Final answer
    x = 522,778.92

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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.