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Finding the Fourth Proportional to 285,476.64, 393,929.10 and 158,128.44

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Solution

The fourth proportional to 285,476.64, 393,929.10 and 158,128.44 is: 218,201.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,476.64 : 393,929.10 = 158,128.44 : x
  2. Step 2: Convert to fraction form
    285,476.64/393,929.10 = 158,128.44/x
  3. Step 3: Cross multiply
    285,476.64x = 393,929.10 × 158,128.44
  4. Step 4: Simplify right side
    285,476.64x = 62,291,394,053.60
  5. Step 5: Solve for x
    x = 62,291,394,053.60/285,476.64
  6. Step 6: Final answer
    x = 218,201.37

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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.