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Finding the Fourth Proportional to 680,204.88, 938,683.62 and 378,398.88

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Solution

The fourth proportional to 680,204.88, 938,683.62 and 378,398.88 is: 522,190.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,204.88 : 938,683.62 = 378,398.88 : x
  2. Step 2: Convert to fraction form
    680,204.88/938,683.62 = 378,398.88/x
  3. Step 3: Cross multiply
    680,204.88x = 938,683.62 × 378,398.88
  4. Step 4: Simplify right side
    680,204.88x = 355,196,830,482.35
  5. Step 5: Solve for x
    x = 355,196,830,482.35/680,204.88
  6. Step 6: Final answer
    x = 522,190.95

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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.