Home / 280,166.40-386,142.72-240,353.28

Finding the Fourth Proportional to 280,166.40, 386,142.72 and 240,353.28

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Solution

The fourth proportional to 280,166.40, 386,142.72 and 240,353.28 is: 331,269.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,166.40 : 386,142.72 = 240,353.28 : x
  2. Step 2: Convert to fraction form
    280,166.40/386,142.72 = 240,353.28/x
  3. Step 3: Cross multiply
    280,166.40x = 386,142.72 × 240,353.28
  4. Step 4: Simplify right side
    280,166.40x = 92,810,669,300.12
  5. Step 5: Solve for x
    x = 92,810,669,300.12/280,166.40
  6. Step 6: Final answer
    x = 331,269.81

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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.