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Finding the Fourth Proportional to 283,451.40, 391,162.89 and 156,126.99

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Solution

The fourth proportional to 283,451.40, 391,162.89 and 156,126.99 is: 215,455.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,451.40 : 391,162.89 = 156,126.99 : x
  2. Step 2: Convert to fraction form
    283,451.40/391,162.89 = 156,126.99/x
  3. Step 3: Cross multiply
    283,451.40x = 391,162.89 × 156,126.99
  4. Step 4: Simplify right side
    283,451.40x = 61,071,084,615.40
  5. Step 5: Solve for x
    x = 61,071,084,615.40/283,451.40
  6. Step 6: Final answer
    x = 215,455.22

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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.