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Finding the Fourth Proportional to 639,189.12, 959,150.02 and 260,039.88

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Solution

The fourth proportional to 639,189.12, 959,150.02 and 260,039.88 is: 390,208.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,189.12 : 959,150.02 = 260,039.88 : x
  2. Step 2: Convert to fraction form
    639,189.12/959,150.02 = 260,039.88/x
  3. Step 3: Cross multiply
    639,189.12x = 959,150.02 × 260,039.88
  4. Step 4: Simplify right side
    639,189.12x = 249,417,256,102.80
  5. Step 5: Solve for x
    x = 249,417,256,102.80/639,189.12
  6. Step 6: Final answer
    x = 390,208.86

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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.