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Finding the Fourth Proportional to 418,977.78, 628,467.96 and 103,434.72

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Solution

The fourth proportional to 418,977.78, 628,467.96 and 103,434.72 is: 155,152.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,977.78 : 628,467.96 = 103,434.72 : x
  2. Step 2: Convert to fraction form
    418,977.78/628,467.96 = 103,434.72/x
  3. Step 3: Cross multiply
    418,977.78x = 628,467.96 × 103,434.72
  4. Step 4: Simplify right side
    418,977.78x = 65,005,407,471.57
  5. Step 5: Solve for x
    x = 65,005,407,471.57/418,977.78
  6. Step 6: Final answer
    x = 155,152.40

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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.