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Finding the Fourth Proportional to 486,308.70, 729,117.45 and 220,196.70

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Solution

The fourth proportional to 486,308.70, 729,117.45 and 220,196.70 is: 330,138.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,308.70 : 729,117.45 = 220,196.70 : x
  2. Step 2: Convert to fraction form
    486,308.70/729,117.45 = 220,196.70/x
  3. Step 3: Cross multiply
    486,308.70x = 729,117.45 × 220,196.70
  4. Step 4: Simplify right side
    486,308.70x = 160,549,256,402.42
  5. Step 5: Solve for x
    x = 160,549,256,402.42/486,308.70
  6. Step 6: Final answer
    x = 330,138.57

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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.