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Finding the Fourth Proportional to 260,048.60, 390,072.90 and 126,860.30

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Solution

The fourth proportional to 260,048.60, 390,072.90 and 126,860.30 is: 190,290.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,048.60 : 390,072.90 = 126,860.30 : x
  2. Step 2: Convert to fraction form
    260,048.60/390,072.90 = 126,860.30/x
  3. Step 3: Cross multiply
    260,048.60x = 390,072.90 × 126,860.30
  4. Step 4: Simplify right side
    260,048.60x = 49,484,765,115.87
  5. Step 5: Solve for x
    x = 49,484,765,115.87/260,048.60
  6. Step 6: Final answer
    x = 190,290.45

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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.