Home / 1,217,981.31-1,680,768.28-666,709.68

Finding the Fourth Proportional to 1,217,981.31, 1,680,768.28 and 666,709.68

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Solution

The fourth proportional to 1,217,981.31, 1,680,768.28 and 666,709.68 is: 920,034.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,981.31 : 1,680,768.28 = 666,709.68 : x
  2. Step 2: Convert to fraction form
    1,217,981.31/1,680,768.28 = 666,709.68/x
  3. Step 3: Cross multiply
    1,217,981.31x = 1,680,768.28 × 666,709.68
  4. Step 4: Simplify right side
    1,217,981.31x = 1,120,584,485,498.98
  5. Step 5: Solve for x
    x = 1,120,584,485,498.98/1,217,981.31
  6. Step 6: Final answer
    x = 920,034.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.