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Finding the Fourth Proportional to 418,658.88, 627,988.32 and 103,121.76

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Solution

The fourth proportional to 418,658.88, 627,988.32 and 103,121.76 is: 154,682.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,658.88 : 627,988.32 = 103,121.76 : x
  2. Step 2: Convert to fraction form
    418,658.88/627,988.32 = 103,121.76/x
  3. Step 3: Cross multiply
    418,658.88x = 627,988.32 × 103,121.76
  4. Step 4: Simplify right side
    418,658.88x = 64,759,260,817.84
  5. Step 5: Solve for x
    x = 64,759,260,817.84/418,658.88
  6. Step 6: Final answer
    x = 154,682.64

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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.