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Finding the Fourth Proportional to 680,064.39, 938,488.84 and 374,134.20

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Solution

The fourth proportional to 680,064.39, 938,488.84 and 374,134.20 is: 516,305.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,064.39 : 938,488.84 = 374,134.20 : x
  2. Step 2: Convert to fraction form
    680,064.39/938,488.84 = 374,134.20/x
  3. Step 3: Cross multiply
    680,064.39x = 938,488.84 × 374,134.20
  4. Step 4: Simplify right side
    680,064.39x = 351,120,771,362.33
  5. Step 5: Solve for x
    x = 351,120,771,362.33/680,064.39
  6. Step 6: Final answer
    x = 516,305.19

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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.