Home / 729,639.09-1,087,119.97-688,895.28

Finding the Fourth Proportional to 729,639.09, 1,087,119.97 and 688,895.28

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Solution

The fourth proportional to 729,639.09, 1,087,119.97 and 688,895.28 is: 1,026,414.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    729,639.09 : 1,087,119.97 = 688,895.28 : x
  2. Step 2: Convert to fraction form
    729,639.09/1,087,119.97 = 688,895.28/x
  3. Step 3: Cross multiply
    729,639.09x = 1,087,119.97 × 688,895.28
  4. Step 4: Simplify right side
    729,639.09x = 748,911,814,404.50
  5. Step 5: Solve for x
    x = 748,911,814,404.50/729,639.09
  6. Step 6: Final answer
    x = 1,026,414.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.