Home / 521,901.20-720,211.44-307,055.12

Finding the Fourth Proportional to 521,901.20, 720,211.44 and 307,055.12

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Solution

The fourth proportional to 521,901.20, 720,211.44 and 307,055.12 is: 423,728.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,901.20 : 720,211.44 = 307,055.12 : x
  2. Step 2: Convert to fraction form
    521,901.20/720,211.44 = 307,055.12/x
  3. Step 3: Cross multiply
    521,901.20x = 720,211.44 × 307,055.12
  4. Step 4: Simplify right side
    521,901.20x = 221,144,610,134.57
  5. Step 5: Solve for x
    x = 221,144,610,134.57/521,901.20
  6. Step 6: Final answer
    x = 423,728.88

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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.