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Finding the Fourth Proportional to 639,790.31, 959,682.69 and 260,626.48

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Solution

The fourth proportional to 639,790.31, 959,682.69 and 260,626.48 is: 390,938.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,790.31 : 959,682.69 = 260,626.48 : x
  2. Step 2: Convert to fraction form
    639,790.31/959,682.69 = 260,626.48/x
  3. Step 3: Cross multiply
    639,790.31x = 959,682.69 × 260,626.48
  4. Step 4: Simplify right side
    639,790.31x = 250,118,719,012.42
  5. Step 5: Solve for x
    x = 250,118,719,012.42/639,790.31
  6. Step 6: Final answer
    x = 390,938.58

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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.