Home / 817,778.20-1,226,667.30-687,141.40

Finding the Fourth Proportional to 817,778.20, 1,226,667.30 and 687,141.40

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Solution

The fourth proportional to 817,778.20, 1,226,667.30 and 687,141.40 is: 1,030,712.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,778.20 : 1,226,667.30 = 687,141.40 : x
  2. Step 2: Convert to fraction form
    817,778.20/1,226,667.30 = 687,141.40/x
  3. Step 3: Cross multiply
    817,778.20x = 1,226,667.30 × 687,141.40
  4. Step 4: Simplify right side
    817,778.20x = 842,893,885,856.22
  5. Step 5: Solve for x
    x = 842,893,885,856.22/817,778.20
  6. Step 6: Final answer
    x = 1,030,712.10

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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.