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Finding the Fourth Proportional to 680,089.80, 938,486.34 and 378,264.36

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Solution

The fourth proportional to 680,089.80, 938,486.34 and 378,264.36 is: 521,983.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,089.80 : 938,486.34 = 378,264.36 : x
  2. Step 2: Convert to fraction form
    680,089.80/938,486.34 = 378,264.36/x
  3. Step 3: Cross multiply
    680,089.80x = 938,486.34 × 378,264.36
  4. Step 4: Simplify right side
    680,089.80x = 354,995,934,768.84
  5. Step 5: Solve for x
    x = 354,995,934,768.84/680,089.80
  6. Step 6: Final answer
    x = 521,983.91

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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.