Home / 521,975.19-720,313.51-307,129.17

Finding the Fourth Proportional to 521,975.19, 720,313.51 and 307,129.17

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Solution

The fourth proportional to 521,975.19, 720,313.51 and 307,129.17 is: 423,831.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,975.19 : 720,313.51 = 307,129.17 : x
  2. Step 2: Convert to fraction form
    521,975.19/720,313.51 = 307,129.17/x
  3. Step 3: Cross multiply
    521,975.19x = 720,313.51 × 307,129.17
  4. Step 4: Simplify right side
    521,975.19x = 221,229,290,466.09
  5. Step 5: Solve for x
    x = 221,229,290,466.09/521,975.19
  6. Step 6: Final answer
    x = 423,831.05

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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.