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Finding the Fourth Proportional to 260,412.80, 390,520.06 and 91,901.72

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Solution

The fourth proportional to 260,412.80, 390,520.06 and 91,901.72 is: 137,817.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,412.80 : 390,520.06 = 91,901.72 : x
  2. Step 2: Convert to fraction form
    260,412.80/390,520.06 = 91,901.72/x
  3. Step 3: Cross multiply
    260,412.80x = 390,520.06 × 91,901.72
  4. Step 4: Simplify right side
    260,412.80x = 35,889,465,955.05
  5. Step 5: Solve for x
    x = 35,889,465,955.05/260,412.80
  6. Step 6: Final answer
    x = 137,817.60

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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.