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Finding the Fourth Proportional to 260,447.40, 390,692.70 and 82,949.40

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Solution

The fourth proportional to 260,447.40, 390,692.70 and 82,949.40 is: 124,430.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,447.40 : 390,692.70 = 82,949.40 : x
  2. Step 2: Convert to fraction form
    260,447.40/390,692.70 = 82,949.40/x
  3. Step 3: Cross multiply
    260,447.40x = 390,692.70 × 82,949.40
  4. Step 4: Simplify right side
    260,447.40x = 32,407,725,049.38
  5. Step 5: Solve for x
    x = 32,407,725,049.38/260,447.40
  6. Step 6: Final answer
    x = 124,430.98

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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.