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Finding the Fourth Proportional to 285,459.45, 393,928.61 and 158,136.09

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Solution

The fourth proportional to 285,459.45, 393,928.61 and 158,136.09 is: 218,224.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,459.45 : 393,928.61 = 158,136.09 : x
  2. Step 2: Convert to fraction form
    285,459.45/393,928.61 = 158,136.09/x
  3. Step 3: Cross multiply
    285,459.45x = 393,928.61 × 158,136.09
  4. Step 4: Simplify right side
    285,459.45x = 62,294,330,124.53
  5. Step 5: Solve for x
    x = 62,294,330,124.53/285,459.45
  6. Step 6: Final answer
    x = 218,224.80

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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.