Home / 1,248,381.80-1,869,404.70-686,781.80

Finding the Fourth Proportional to 1,248,381.80, 1,869,404.70 and 686,781.80

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Solution

The fourth proportional to 1,248,381.80, 1,869,404.70 and 686,781.80 is: 1,028,429.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248,381.80 : 1,869,404.70 = 686,781.80 : x
  2. Step 2: Convert to fraction form
    1,248,381.80/1,869,404.70 = 686,781.80/x
  3. Step 3: Cross multiply
    1,248,381.80x = 1,869,404.70 × 686,781.80
  4. Step 4: Simplify right side
    1,248,381.80x = 1,283,873,124,794.46
  5. Step 5: Solve for x
    x = 1,283,873,124,794.46/1,248,381.80
  6. Step 6: Final answer
    x = 1,028,429.86

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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.