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Finding the Fourth Proportional to 260,072.40, 390,108.60 and 171,498.90

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Solution

The fourth proportional to 260,072.40, 390,108.60 and 171,498.90 is: 257,248.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,072.40 : 390,108.60 = 171,498.90 : x
  2. Step 2: Convert to fraction form
    260,072.40/390,108.60 = 171,498.90/x
  3. Step 3: Cross multiply
    260,072.40x = 390,108.60 × 171,498.90
  4. Step 4: Simplify right side
    260,072.40x = 66,903,195,780.54
  5. Step 5: Solve for x
    x = 66,903,195,780.54/260,072.40
  6. Step 6: Final answer
    x = 257,248.35

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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.