Home / 817,999.20-1,226,998.80-518,817.60

Finding the Fourth Proportional to 817,999.20, 1,226,998.80 and 518,817.60

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Solution

The fourth proportional to 817,999.20, 1,226,998.80 and 518,817.60 is: 778,226.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,999.20 : 1,226,998.80 = 518,817.60 : x
  2. Step 2: Convert to fraction form
    817,999.20/1,226,998.80 = 518,817.60/x
  3. Step 3: Cross multiply
    817,999.20x = 1,226,998.80 × 518,817.60
  4. Step 4: Simplify right side
    817,999.20x = 636,588,572,618.88
  5. Step 5: Solve for x
    x = 636,588,572,618.88/817,999.20
  6. Step 6: Final answer
    x = 778,226.40

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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.