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Finding the Fourth Proportional to 612,497.57, 918,743.18 and 157,086.68

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Solution

The fourth proportional to 612,497.57, 918,743.18 and 157,086.68 is: 235,629.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,497.57 : 918,743.18 = 157,086.68 : x
  2. Step 2: Convert to fraction form
    612,497.57/918,743.18 = 157,086.68/x
  3. Step 3: Cross multiply
    612,497.57x = 918,743.18 × 157,086.68
  4. Step 4: Simplify right side
    612,497.57x = 144,322,310,539.69
  5. Step 5: Solve for x
    x = 144,322,310,539.69/612,497.57
  6. Step 6: Final answer
    x = 235,629.20

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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.