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Finding the Fourth Proportional to 256,663.29, 384,866.46 and 79,147.25

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Solution

The fourth proportional to 256,663.29, 384,866.46 and 79,147.25 is: 118,681.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,663.29 : 384,866.46 = 79,147.25 : x
  2. Step 2: Convert to fraction form
    256,663.29/384,866.46 = 79,147.25/x
  3. Step 3: Cross multiply
    256,663.29x = 384,866.46 × 79,147.25
  4. Step 4: Simplify right side
    256,663.29x = 30,461,120,001.90
  5. Step 5: Solve for x
    x = 30,461,120,001.90/256,663.29
  6. Step 6: Final answer
    x = 118,681.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.