Home / 1,221,381.40-1,833,821.70-689,940.40

Finding the Fourth Proportional to 1,221,381.40, 1,833,821.70 and 689,940.40

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Solution

The fourth proportional to 1,221,381.40, 1,833,821.70 and 689,940.40 is: 1,035,898.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,381.40 : 1,833,821.70 = 689,940.40 : x
  2. Step 2: Convert to fraction form
    1,221,381.40/1,833,821.70 = 689,940.40/x
  3. Step 3: Cross multiply
    1,221,381.40x = 1,833,821.70 × 689,940.40
  4. Step 4: Simplify right side
    1,221,381.40x = 1,265,227,677,226.68
  5. Step 5: Solve for x
    x = 1,265,227,677,226.68/1,221,381.40
  6. Step 6: Final answer
    x = 1,035,898.92

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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.