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Finding the Fourth Proportional to 639,900.95, 960,049.51 and 384,019.25

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Solution

The fourth proportional to 639,900.95, 960,049.51 and 384,019.25 is: 576,147.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,900.95 : 960,049.51 = 384,019.25 : x
  2. Step 2: Convert to fraction form
    639,900.95/960,049.51 = 384,019.25/x
  3. Step 3: Cross multiply
    639,900.95x = 960,049.51 × 384,019.25
  4. Step 4: Simplify right side
    639,900.95x = 368,677,487,032.77
  5. Step 5: Solve for x
    x = 368,677,487,032.77/639,900.95
  6. Step 6: Final answer
    x = 576,147.75

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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.