Home / 817,826.60-1,227,200.70-319,125.80

Finding the Fourth Proportional to 817,826.60, 1,227,200.70 and 319,125.80

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Solution

The fourth proportional to 817,826.60, 1,227,200.70 and 319,125.80 is: 478,868.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,826.60 : 1,227,200.70 = 319,125.80 : x
  2. Step 2: Convert to fraction form
    817,826.60/1,227,200.70 = 319,125.80/x
  3. Step 3: Cross multiply
    817,826.60x = 1,227,200.70 × 319,125.80
  4. Step 4: Simplify right side
    817,826.60x = 391,631,405,148.06
  5. Step 5: Solve for x
    x = 391,631,405,148.06/817,826.60
  6. Step 6: Final answer
    x = 478,868.51

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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.