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Finding the Fourth Proportional to 260,575.79, 390,859.56 and 83,081.60

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Solution

The fourth proportional to 260,575.79, 390,859.56 and 83,081.60 is: 124,621.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,575.79 : 390,859.56 = 83,081.60 : x
  2. Step 2: Convert to fraction form
    260,575.79/390,859.56 = 83,081.60/x
  3. Step 3: Cross multiply
    260,575.79x = 390,859.56 × 83,081.60
  4. Step 4: Simplify right side
    260,575.79x = 32,473,235,665.80
  5. Step 5: Solve for x
    x = 32,473,235,665.80/260,575.79
  6. Step 6: Final answer
    x = 124,621.08

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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.