Home / 811,905-1,217,862.56-212,860.76

Finding the Fourth Proportional to 811,905, 1,217,862.56 and 212,860.76

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Solution

The fourth proportional to 811,905, 1,217,862.56 and 212,860.76 is: 319,292.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,905 : 1,217,862.56 = 212,860.76 : x
  2. Step 2: Convert to fraction form
    811,905/1,217,862.56 = 212,860.76/x
  3. Step 3: Cross multiply
    811,905x = 1,217,862.56 × 212,860.76
  4. Step 4: Simplify right side
    811,905x = 259,235,150,097.15
  5. Step 5: Solve for x
    x = 259,235,150,097.15/811,905
  6. Step 6: Final answer
    x = 319,292.47

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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.