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Finding the Fourth Proportional to 639,189.62, 959,150.76 and 260,040.37

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Solution

The fourth proportional to 639,189.62, 959,150.76 and 260,040.37 is: 390,209.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,189.62 : 959,150.76 = 260,040.37 : x
  2. Step 2: Convert to fraction form
    639,189.62/959,150.76 = 260,040.37/x
  3. Step 3: Cross multiply
    639,189.62x = 959,150.76 × 260,040.37
  4. Step 4: Simplify right side
    639,189.62x = 249,417,913,720.43
  5. Step 5: Solve for x
    x = 249,417,913,720.43/639,189.62
  6. Step 6: Final answer
    x = 390,209.58

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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.