Home / 1,290,672.80-1,781,171.74-709,920.50

Finding the Fourth Proportional to 1,290,672.80, 1,781,171.74 and 709,920.50

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Solution

The fourth proportional to 1,290,672.80, 1,781,171.74 and 709,920.50 is: 979,714.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,672.80 : 1,781,171.74 = 709,920.50 : x
  2. Step 2: Convert to fraction form
    1,290,672.80/1,781,171.74 = 709,920.50/x
  3. Step 3: Cross multiply
    1,290,672.80x = 1,781,171.74 × 709,920.50
  4. Step 4: Simplify right side
    1,290,672.80x = 1,264,490,332,246.67
  5. Step 5: Solve for x
    x = 1,264,490,332,246.67/1,290,672.80
  6. Step 6: Final answer
    x = 979,714.09

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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.