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Finding the Fourth Proportional to 338,380.71, 507,374.33 and 128,034.87

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Solution

The fourth proportional to 338,380.71, 507,374.33 and 128,034.87 is: 191,977.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,380.71 : 507,374.33 = 128,034.87 : x
  2. Step 2: Convert to fraction form
    338,380.71/507,374.33 = 128,034.87/x
  3. Step 3: Cross multiply
    338,380.71x = 507,374.33 × 128,034.87
  4. Step 4: Simplify right side
    338,380.71x = 64,961,605,742.71
  5. Step 5: Solve for x
    x = 64,961,605,742.71/338,380.71
  6. Step 6: Final answer
    x = 191,977.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.