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Finding the Fourth Proportional to 283,400.72, 391,128.74 and 162,539.40

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Solution

The fourth proportional to 283,400.72, 391,128.74 and 162,539.40 is: 224,324.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,400.72 : 391,128.74 = 162,539.40 : x
  2. Step 2: Convert to fraction form
    283,400.72/391,128.74 = 162,539.40/x
  3. Step 3: Cross multiply
    283,400.72x = 391,128.74 × 162,539.40
  4. Step 4: Simplify right side
    283,400.72x = 63,573,830,722.36
  5. Step 5: Solve for x
    x = 63,573,830,722.36/283,400.72
  6. Step 6: Final answer
    x = 224,324.87

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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.