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Finding the Fourth Proportional to 260,003.80, 390,005.70 and 126,969.40

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Solution

The fourth proportional to 260,003.80, 390,005.70 and 126,969.40 is: 190,454.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,003.80 : 390,005.70 = 126,969.40 : x
  2. Step 2: Convert to fraction form
    260,003.80/390,005.70 = 126,969.40/x
  3. Step 3: Cross multiply
    260,003.80x = 390,005.70 × 126,969.40
  4. Step 4: Simplify right side
    260,003.80x = 49,518,789,725.58
  5. Step 5: Solve for x
    x = 49,518,789,725.58/260,003.80
  6. Step 6: Final answer
    x = 190,454.10

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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.