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Finding the Fourth Proportional to 260,630.26, 390,432.81 and 171,613.89

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Solution

The fourth proportional to 260,630.26, 390,432.81 and 171,613.89 is: 257,083.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,630.26 : 390,432.81 = 171,613.89 : x
  2. Step 2: Convert to fraction form
    260,630.26/390,432.81 = 171,613.89/x
  3. Step 3: Cross multiply
    260,630.26x = 390,432.81 × 171,613.89
  4. Step 4: Simplify right side
    260,630.26x = 67,003,692,985.95
  5. Step 5: Solve for x
    x = 67,003,692,985.95/260,630.26
  6. Step 6: Final answer
    x = 257,083.32

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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.