Home / 840,005.90-1,260,013.42-208,919.72

Finding the Fourth Proportional to 840,005.90, 1,260,013.42 and 208,919.72

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Solution

The fourth proportional to 840,005.90, 1,260,013.42 and 208,919.72 is: 313,380.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,005.90 : 1,260,013.42 = 208,919.72 : x
  2. Step 2: Convert to fraction form
    840,005.90/1,260,013.42 = 208,919.72/x
  3. Step 3: Cross multiply
    840,005.90x = 1,260,013.42 × 208,919.72
  4. Step 4: Simplify right side
    840,005.90x = 263,241,650,902.64
  5. Step 5: Solve for x
    x = 263,241,650,902.64/840,005.90
  6. Step 6: Final answer
    x = 313,380.72

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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.