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Finding the Fourth Proportional to 260,410.37, 390,646.80 and 91,895.90

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Solution

The fourth proportional to 260,410.37, 390,646.80 and 91,895.90 is: 137,854.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,410.37 : 390,646.80 = 91,895.90 : x
  2. Step 2: Convert to fraction form
    260,410.37/390,646.80 = 91,895.90/x
  3. Step 3: Cross multiply
    260,410.37x = 390,646.80 × 91,895.90
  4. Step 4: Simplify right side
    260,410.37x = 35,898,837,314.89
  5. Step 5: Solve for x
    x = 35,898,837,314.89/260,410.37
  6. Step 6: Final answer
    x = 137,854.87

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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.