Home / 285,459.07-393,928.09-158,135.71

Finding the Fourth Proportional to 285,459.07, 393,928.09 and 158,135.71

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Solution

The fourth proportional to 285,459.07, 393,928.09 and 158,135.71 is: 218,224.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,459.07 : 393,928.09 = 158,135.71 : x
  2. Step 2: Convert to fraction form
    285,459.07/393,928.09 = 158,135.71/x
  3. Step 3: Cross multiply
    285,459.07x = 393,928.09 × 158,135.71
  4. Step 4: Simplify right side
    285,459.07x = 62,294,098,201.09
  5. Step 5: Solve for x
    x = 62,294,098,201.09/285,459.07
  6. Step 6: Final answer
    x = 218,224.27

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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.