Home / 1,221,345.90-1,833,768.45-689,904.90

Finding the Fourth Proportional to 1,221,345.90, 1,833,768.45 and 689,904.90

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Solution

The fourth proportional to 1,221,345.90, 1,833,768.45 and 689,904.90 is: 1,035,845.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,345.90 : 1,833,768.45 = 689,904.90 : x
  2. Step 2: Convert to fraction form
    1,221,345.90/1,833,768.45 = 689,904.90/x
  3. Step 3: Cross multiply
    1,221,345.90x = 1,833,768.45 × 689,904.90
  4. Step 4: Simplify right side
    1,221,345.90x = 1,265,125,839,120.41
  5. Step 5: Solve for x
    x = 1,265,125,839,120.41/1,221,345.90
  6. Step 6: Final answer
    x = 1,035,845.65

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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.