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Finding the Fourth Proportional to 260,417.72, 390,657.84 and 91,903.26

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Solution

The fourth proportional to 260,417.72, 390,657.84 and 91,903.26 is: 137,865.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,417.72 : 390,657.84 = 91,903.26 : x
  2. Step 2: Convert to fraction form
    260,417.72/390,657.84 = 91,903.26/x
  3. Step 3: Cross multiply
    260,417.72x = 390,657.84 × 91,903.26
  4. Step 4: Simplify right side
    260,417.72x = 35,902,729,040.56
  5. Step 5: Solve for x
    x = 35,902,729,040.56/260,417.72
  6. Step 6: Final answer
    x = 137,865.92

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1.5x scale

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.