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Finding the Fourth Proportional to 338,471.60, 507,901.80 and 128,260.40

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Solution

The fourth proportional to 338,471.60, 507,901.80 and 128,260.40 is: 192,464.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,471.60 : 507,901.80 = 128,260.40 : x
  2. Step 2: Convert to fraction form
    338,471.60/507,901.80 = 128,260.40/x
  3. Step 3: Cross multiply
    338,471.60x = 507,901.80 × 128,260.40
  4. Step 4: Simplify right side
    338,471.60x = 65,143,688,028.72
  5. Step 5: Solve for x
    x = 65,143,688,028.72/338,471.60
  6. Step 6: Final answer
    x = 192,464.27

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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.