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Finding the Fourth Proportional to 680,190.48, 938,663.76 and 378,384.48

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Solution

The fourth proportional to 680,190.48, 938,663.76 and 378,384.48 is: 522,171.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,190.48 : 938,663.76 = 378,384.48 : x
  2. Step 2: Convert to fraction form
    680,190.48/938,663.76 = 378,384.48/x
  3. Step 3: Cross multiply
    680,190.48x = 938,663.76 × 378,384.48
  4. Step 4: Simplify right side
    680,190.48x = 355,175,798,722.45
  5. Step 5: Solve for x
    x = 355,175,798,722.45/680,190.48
  6. Step 6: Final answer
    x = 522,171.08

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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.