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Finding the Fourth Proportional to 418,977.27, 628,467.21 and 103,434.21

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Solution

The fourth proportional to 418,977.27, 628,467.21 and 103,434.21 is: 155,151.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,977.27 : 628,467.21 = 103,434.21 : x
  2. Step 2: Convert to fraction form
    418,977.27/628,467.21 = 103,434.21/x
  3. Step 3: Cross multiply
    418,977.27x = 628,467.21 × 103,434.21
  4. Step 4: Simplify right side
    418,977.27x = 65,005,009,377.25
  5. Step 5: Solve for x
    x = 65,005,009,377.25/418,977.27
  6. Step 6: Final answer
    x = 155,151.64

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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.