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Finding the Fourth Proportional to 639,901.95, 960,051.01 and 384,020.25

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Solution

The fourth proportional to 639,901.95, 960,051.01 and 384,020.25 is: 576,149.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,901.95 : 960,051.01 = 384,020.25 : x
  2. Step 2: Convert to fraction form
    639,901.95/960,051.01 = 384,020.25/x
  3. Step 3: Cross multiply
    639,901.95x = 960,051.01 × 384,020.25
  4. Step 4: Simplify right side
    639,901.95x = 368,679,028,872.95
  5. Step 5: Solve for x
    x = 368,679,028,872.95/639,901.95
  6. Step 6: Final answer
    x = 576,149.25

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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.