Home / 812,710.50-1,218,968.68-213,718.32

Finding the Fourth Proportional to 812,710.50, 1,218,968.68 and 213,718.32

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Solution

The fourth proportional to 812,710.50, 1,218,968.68 and 213,718.32 is: 320,551.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,710.50 : 1,218,968.68 = 213,718.32 : x
  2. Step 2: Convert to fraction form
    812,710.50/1,218,968.68 = 213,718.32/x
  3. Step 3: Cross multiply
    812,710.50x = 1,218,968.68 × 213,718.32
  4. Step 4: Simplify right side
    812,710.50x = 260,515,938,422.22
  5. Step 5: Solve for x
    x = 260,515,938,422.22/812,710.50
  6. Step 6: Final answer
    x = 320,551.95

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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.