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Finding the Fourth Proportional to 260,742.30, 391,113.45 and 243,116.70

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Solution

The fourth proportional to 260,742.30, 391,113.45 and 243,116.70 is: 364,675.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,742.30 : 391,113.45 = 243,116.70 : x
  2. Step 2: Convert to fraction form
    260,742.30/391,113.45 = 243,116.70/x
  3. Step 3: Cross multiply
    260,742.30x = 391,113.45 × 243,116.70
  4. Step 4: Simplify right side
    260,742.30x = 95,086,211,289.62
  5. Step 5: Solve for x
    x = 95,086,211,289.62/260,742.30
  6. Step 6: Final answer
    x = 364,675.05

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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.