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Finding the Fourth Proportional to 283,720.39, 391,561.70 and 211,975.85

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Solution

The fourth proportional to 283,720.39, 391,561.70 and 211,975.85 is: 292,547.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,720.39 : 391,561.70 = 211,975.85 : x
  2. Step 2: Convert to fraction form
    283,720.39/391,561.70 = 211,975.85/x
  3. Step 3: Cross multiply
    283,720.39x = 391,561.70 × 211,975.85
  4. Step 4: Simplify right side
    283,720.39x = 83,001,624,103.97
  5. Step 5: Solve for x
    x = 83,001,624,103.97/283,720.39
  6. Step 6: Final answer
    x = 292,547.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.