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Finding the Fourth Proportional to 262,335.91, 393,459.84 and 72,815.53

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Solution

The fourth proportional to 262,335.91, 393,459.84 and 72,815.53 is: 109,211.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,335.91 : 393,459.84 = 72,815.53 : x
  2. Step 2: Convert to fraction form
    262,335.91/393,459.84 = 72,815.53/x
  3. Step 3: Cross multiply
    262,335.91x = 393,459.84 × 72,815.53
  4. Step 4: Simplify right side
    262,335.91x = 28,649,986,783.32
  5. Step 5: Solve for x
    x = 28,649,986,783.32/262,335.91
  6. Step 6: Final answer
    x = 109,211.08

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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.