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Finding the Fourth Proportional to 285,496.88, 393,998.60 and 158,172.47

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Solution

The fourth proportional to 285,496.88, 393,998.60 and 158,172.47 is: 218,285.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,496.88 : 393,998.60 = 158,172.47 : x
  2. Step 2: Convert to fraction form
    285,496.88/393,998.60 = 158,172.47/x
  3. Step 3: Cross multiply
    285,496.88x = 393,998.60 × 158,172.47
  4. Step 4: Simplify right side
    285,496.88x = 62,319,731,641.47
  5. Step 5: Solve for x
    x = 62,319,731,641.47/285,496.88
  6. Step 6: Final answer
    x = 218,285.16

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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.