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Finding the Fourth Proportional to 260,658.12, 390,855.96 and 127,338.60

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Solution

The fourth proportional to 260,658.12, 390,855.96 and 127,338.60 is: 190,943.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,658.12 : 390,855.96 = 127,338.60 : x
  2. Step 2: Convert to fraction form
    260,658.12/390,855.96 = 127,338.60/x
  3. Step 3: Cross multiply
    260,658.12x = 390,855.96 × 127,338.60
  4. Step 4: Simplify right side
    260,658.12x = 49,771,050,748.06
  5. Step 5: Solve for x
    x = 49,771,050,748.06/260,658.12
  6. Step 6: Final answer
    x = 190,943.80

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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.