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Finding the Fourth Proportional to 257,335.44, 385,990.80 and 70,347.36

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Solution

The fourth proportional to 257,335.44, 385,990.80 and 70,347.36 is: 105,517.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,335.44 : 385,990.80 = 70,347.36 : x
  2. Step 2: Convert to fraction form
    257,335.44/385,990.80 = 70,347.36/x
  3. Step 3: Cross multiply
    257,335.44x = 385,990.80 × 70,347.36
  4. Step 4: Simplify right side
    257,335.44x = 27,153,433,764.29
  5. Step 5: Solve for x
    x = 27,153,433,764.29/257,335.44
  6. Step 6: Final answer
    x = 105,517.66

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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.