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Finding the Fourth Proportional to 680,299.14, 938,498.69 and 438,659.33

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Solution

The fourth proportional to 680,299.14, 938,498.69 and 438,659.33 is: 605,147.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,299.14 : 938,498.69 = 438,659.33 : x
  2. Step 2: Convert to fraction form
    680,299.14/938,498.69 = 438,659.33/x
  3. Step 3: Cross multiply
    680,299.14x = 938,498.69 × 438,659.33
  4. Step 4: Simplify right side
    680,299.14x = 411,681,199,675.49
  5. Step 5: Solve for x
    x = 411,681,199,675.49/680,299.14
  6. Step 6: Final answer
    x = 605,147.32

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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.