Home / 380,220.68-524,705.20-208,138.76

Finding the Fourth Proportional to 380,220.68, 524,705.20 and 208,138.76

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Solution

The fourth proportional to 380,220.68, 524,705.20 and 208,138.76 is: 287,231.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,220.68 : 524,705.20 = 208,138.76 : x
  2. Step 2: Convert to fraction form
    380,220.68/524,705.20 = 208,138.76/x
  3. Step 3: Cross multiply
    380,220.68x = 524,705.20 × 208,138.76
  4. Step 4: Simplify right side
    380,220.68x = 109,211,489,693.55
  5. Step 5: Solve for x
    x = 109,211,489,693.55/380,220.68
  6. Step 6: Final answer
    x = 287,231.85

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Double scale
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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.