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Finding the Fourth Proportional to 260,485.14, 390,758.88 and 91,970.82

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Solution

The fourth proportional to 260,485.14, 390,758.88 and 91,970.82 is: 137,967.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,485.14 : 390,758.88 = 91,970.82 : x
  2. Step 2: Convert to fraction form
    260,485.14/390,758.88 = 91,970.82/x
  3. Step 3: Cross multiply
    260,485.14x = 390,758.88 × 91,970.82
  4. Step 4: Simplify right side
    260,485.14x = 35,938,414,615.88
  5. Step 5: Solve for x
    x = 35,938,414,615.88/260,485.14
  6. Step 6: Final answer
    x = 137,967.24

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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.