Home / 388,960.96-583,091.28-139,584.64

Finding the Fourth Proportional to 388,960.96, 583,091.28 and 139,584.64

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Solution

The fourth proportional to 388,960.96, 583,091.28 and 139,584.64 is: 209,251.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,960.96 : 583,091.28 = 139,584.64 : x
  2. Step 2: Convert to fraction form
    388,960.96/583,091.28 = 139,584.64/x
  3. Step 3: Cross multiply
    388,960.96x = 583,091.28 × 139,584.64
  4. Step 4: Simplify right side
    388,960.96x = 81,390,586,405.94
  5. Step 5: Solve for x
    x = 81,390,586,405.94/388,960.96
  6. Step 6: Final answer
    x = 209,251.30

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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.