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Finding the Fourth Proportional to 700,908.80, 1,051,622.40 and 280,486.40

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Solution

The fourth proportional to 700,908.80, 1,051,622.40 and 280,486.40 is: 420,833.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    700,908.80 : 1,051,622.40 = 280,486.40 : x
  2. Step 2: Convert to fraction form
    700,908.80/1,051,622.40 = 280,486.40/x
  3. Step 3: Cross multiply
    700,908.80x = 1,051,622.40 × 280,486.40
  4. Step 4: Simplify right side
    700,908.80x = 294,965,781,135.36
  5. Step 5: Solve for x
    x = 294,965,781,135.36/700,908.80
  6. Step 6: Final answer
    x = 420,833.33

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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.