Home / 1,221.58-1,831.29-707.50

Finding the Fourth Proportional to 1,221.58, 1,831.29 and 707.50

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Solution

The fourth proportional to 1,221.58, 1,831.29 and 707.50 is: 1,060.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.58 : 1,831.29 = 707.50 : x
  2. Step 2: Convert to fraction form
    1,221.58/1,831.29 = 707.50/x
  3. Step 3: Cross multiply
    1,221.58x = 1,831.29 × 707.50
  4. Step 4: Simplify right side
    1,221.58x = 1,295,637.68
  5. Step 5: Solve for x
    x = 1,295,637.68/1,221.58
  6. Step 6: Final answer
    x = 1,060.62

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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.