Home / 1,221,742.96-1,686,995.85-763,391.50

Finding the Fourth Proportional to 1,221,742.96, 1,686,995.85 and 763,391.50

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Solution

The fourth proportional to 1,221,742.96, 1,686,995.85 and 763,391.50 is: 1,054,099.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,742.96 : 1,686,995.85 = 763,391.50 : x
  2. Step 2: Convert to fraction form
    1,221,742.96/1,686,995.85 = 763,391.50/x
  3. Step 3: Cross multiply
    1,221,742.96x = 1,686,995.85 × 763,391.50
  4. Step 4: Simplify right side
    1,221,742.96x = 1,287,838,292,425.28
  5. Step 5: Solve for x
    x = 1,287,838,292,425.28/1,221,742.96
  6. Step 6: Final answer
    x = 1,054,099.21

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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.