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Finding the Fourth Proportional to 285,021.72, 393,327.36 and 157,694.58

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Solution

The fourth proportional to 285,021.72, 393,327.36 and 157,694.58 is: 217,617.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,021.72 : 393,327.36 = 157,694.58 : x
  2. Step 2: Convert to fraction form
    285,021.72/393,327.36 = 157,694.58/x
  3. Step 3: Cross multiply
    285,021.72x = 393,327.36 × 157,694.58
  4. Step 4: Simplify right side
    285,021.72x = 62,025,592,837.71
  5. Step 5: Solve for x
    x = 62,025,592,837.71/285,021.72
  6. Step 6: Final answer
    x = 217,617.07

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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.