Home / 282,469.12-389,809.20-155,143.60

Finding the Fourth Proportional to 282,469.12, 389,809.20 and 155,143.60

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Solution

The fourth proportional to 282,469.12, 389,809.20 and 155,143.60 is: 214,099.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,469.12 : 389,809.20 = 155,143.60 : x
  2. Step 2: Convert to fraction form
    282,469.12/389,809.20 = 155,143.60/x
  3. Step 3: Cross multiply
    282,469.12x = 389,809.20 × 155,143.60
  4. Step 4: Simplify right side
    282,469.12x = 60,476,402,601.12
  5. Step 5: Solve for x
    x = 60,476,402,601.12/282,469.12
  6. Step 6: Final answer
    x = 214,099.16

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1.5x scale

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.