Home / 1,220,949.90-1,685,489.40-813,730.50

Finding the Fourth Proportional to 1,220,949.90, 1,685,489.40 and 813,730.50

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Solution

The fourth proportional to 1,220,949.90, 1,685,489.40 and 813,730.50 is: 1,123,333.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220,949.90 : 1,685,489.40 = 813,730.50 : x
  2. Step 2: Convert to fraction form
    1,220,949.90/1,685,489.40 = 813,730.50/x
  3. Step 3: Cross multiply
    1,220,949.90x = 1,685,489.40 × 813,730.50
  4. Step 4: Simplify right side
    1,220,949.90x = 1,371,534,132,206.70
  5. Step 5: Solve for x
    x = 1,371,534,132,206.70/1,220,949.90
  6. Step 6: Final answer
    x = 1,123,333.67

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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.