Home / 521,109.20-781,313.40-205,403.60

Finding the Fourth Proportional to 521,109.20, 781,313.40 and 205,403.60

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Solution

The fourth proportional to 521,109.20, 781,313.40 and 205,403.60 is: 307,967.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,109.20 : 781,313.40 = 205,403.60 : x
  2. Step 2: Convert to fraction form
    521,109.20/781,313.40 = 205,403.60/x
  3. Step 3: Cross multiply
    521,109.20x = 781,313.40 × 205,403.60
  4. Step 4: Simplify right side
    521,109.20x = 160,484,585,088.24
  5. Step 5: Solve for x
    x = 160,484,585,088.24/521,109.20
  6. Step 6: Final answer
    x = 307,967.28

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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.