Home / 808,521.30-1,212,785.55-209,439.90

Finding the Fourth Proportional to 808,521.30, 1,212,785.55 and 209,439.90

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Solution

The fourth proportional to 808,521.30, 1,212,785.55 and 209,439.90 is: 314,160.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,521.30 : 1,212,785.55 = 209,439.90 : x
  2. Step 2: Convert to fraction form
    808,521.30/1,212,785.55 = 209,439.90/x
  3. Step 3: Cross multiply
    808,521.30x = 1,212,785.55 × 209,439.90
  4. Step 4: Simplify right side
    808,521.30x = 254,005,684,313.45
  5. Step 5: Solve for x
    x = 254,005,684,313.45/808,521.30
  6. Step 6: Final answer
    x = 314,160.78

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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.