Home / 521,531.64-719,688.78-320,288.76

Finding the Fourth Proportional to 521,531.64, 719,688.78 and 320,288.76

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Solution

The fourth proportional to 521,531.64, 719,688.78 and 320,288.76 is: 441,983.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,531.64 : 719,688.78 = 320,288.76 : x
  2. Step 2: Convert to fraction form
    521,531.64/719,688.78 = 320,288.76/x
  3. Step 3: Cross multiply
    521,531.64x = 719,688.78 × 320,288.76
  4. Step 4: Simplify right side
    521,531.64x = 230,508,226,932.11
  5. Step 5: Solve for x
    x = 230,508,226,932.11/521,531.64
  6. Step 6: Final answer
    x = 441,983.21

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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.