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Finding the Fourth Proportional to 639,800.54, 959,698.04 and 260,636.72

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Solution

The fourth proportional to 639,800.54, 959,698.04 and 260,636.72 is: 390,953.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,800.54 : 959,698.04 = 260,636.72 : x
  2. Step 2: Convert to fraction form
    639,800.54/959,698.04 = 260,636.72/x
  3. Step 3: Cross multiply
    639,800.54x = 959,698.04 × 260,636.72
  4. Step 4: Simplify right side
    639,800.54x = 250,132,549,336.03
  5. Step 5: Solve for x
    x = 250,132,549,336.03/639,800.54
  6. Step 6: Final answer
    x = 390,953.95

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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.