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Finding the Fourth Proportional to 680,067.63, 938,491.92 and 374,143.28

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Solution

The fourth proportional to 680,067.63, 938,491.92 and 374,143.28 is: 516,316.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,067.63 : 938,491.92 = 374,143.28 : x
  2. Step 2: Convert to fraction form
    680,067.63/938,491.92 = 374,143.28/x
  3. Step 3: Cross multiply
    680,067.63x = 938,491.92 × 374,143.28
  4. Step 4: Simplify right side
    680,067.63x = 351,130,440,509.84
  5. Step 5: Solve for x
    x = 351,130,440,509.84/680,067.63
  6. Step 6: Final answer
    x = 516,316.94

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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.