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Finding the Fourth Proportional to 680,290.32, 938,486.55 and 438,650.49

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Solution

The fourth proportional to 680,290.32, 938,486.55 and 438,650.49 is: 605,135.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,290.32 : 938,486.55 = 438,650.49 : x
  2. Step 2: Convert to fraction form
    680,290.32/938,486.55 = 438,650.49/x
  3. Step 3: Cross multiply
    680,290.32x = 938,486.55 × 438,650.49
  4. Step 4: Simplify right side
    680,290.32x = 411,667,585,015.91
  5. Step 5: Solve for x
    x = 411,667,585,015.91/680,290.32
  6. Step 6: Final answer
    x = 605,135.15

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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.