Home / 1,220.84-1,831.20-399.08

Finding the Fourth Proportional to 1,220.84, 1,831.20 and 399.08

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Solution

The fourth proportional to 1,220.84, 1,831.20 and 399.08 is: 598.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.84 : 1,831.20 = 399.08 : x
  2. Step 2: Convert to fraction form
    1,220.84/1,831.20 = 399.08/x
  3. Step 3: Cross multiply
    1,220.84x = 1,831.20 × 399.08
  4. Step 4: Simplify right side
    1,220.84x = 730,795.30
  5. Step 5: Solve for x
    x = 730,795.30/1,220.84
  6. Step 6: Final answer
    x = 598.60

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1.5x scale

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.