Home / 521,976.19-720,314.89-307,130.17

Finding the Fourth Proportional to 521,976.19, 720,314.89 and 307,130.17

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Solution

The fourth proportional to 521,976.19, 720,314.89 and 307,130.17 is: 423,832.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,976.19 : 720,314.89 = 307,130.17 : x
  2. Step 2: Convert to fraction form
    521,976.19/720,314.89 = 307,130.17/x
  3. Step 3: Cross multiply
    521,976.19x = 720,314.89 × 307,130.17
  4. Step 4: Simplify right side
    521,976.19x = 221,230,434,619.23
  5. Step 5: Solve for x
    x = 221,230,434,619.23/521,976.19
  6. Step 6: Final answer
    x = 423,832.43

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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.