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Finding the Fourth Proportional to 680,039.34, 938,454.39 and 374,119.98

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Solution

The fourth proportional to 680,039.34, 938,454.39 and 374,119.98 is: 516,285.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,039.34 : 938,454.39 = 374,119.98 : x
  2. Step 2: Convert to fraction form
    680,039.34/938,454.39 = 374,119.98/x
  3. Step 3: Cross multiply
    680,039.34x = 938,454.39 × 374,119.98
  4. Step 4: Simplify right side
    680,039.34x = 351,094,537,617.71
  5. Step 5: Solve for x
    x = 351,094,537,617.71/680,039.34
  6. Step 6: Final answer
    x = 516,285.63

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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.