Home / 812,406.40-1,218,819.84-475,731.52

Finding the Fourth Proportional to 812,406.40, 1,218,819.84 and 475,731.52

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Solution

The fourth proportional to 812,406.40, 1,218,819.84 and 475,731.52 is: 713,720.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,406.40 : 1,218,819.84 = 475,731.52 : x
  2. Step 2: Convert to fraction form
    812,406.40/1,218,819.84 = 475,731.52/x
  3. Step 3: Cross multiply
    812,406.40x = 1,218,819.84 × 475,731.52
  4. Step 4: Simplify right side
    812,406.40x = 579,831,015,089.36
  5. Step 5: Solve for x
    x = 579,831,015,089.36/812,406.40
  6. Step 6: Final answer
    x = 713,720.39

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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.