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Finding the Fourth Proportional to 639,089.88, 958,765.95 and 260,009.61

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Solution

The fourth proportional to 639,089.88, 958,765.95 and 260,009.61 is: 390,067.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,089.88 : 958,765.95 = 260,009.61 : x
  2. Step 2: Convert to fraction form
    639,089.88/958,765.95 = 260,009.61/x
  3. Step 3: Cross multiply
    639,089.88x = 958,765.95 × 260,009.61
  4. Step 4: Simplify right side
    639,089.88x = 249,288,360,740.78
  5. Step 5: Solve for x
    x = 249,288,360,740.78/639,089.88
  6. Step 6: Final answer
    x = 390,067.76

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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.