Home / 643,424.34-887,926.64-356,944.43

Finding the Fourth Proportional to 643,424.34, 887,926.64 and 356,944.43

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Solution

The fourth proportional to 643,424.34, 887,926.64 and 356,944.43 is: 492,583.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,424.34 : 887,926.64 = 356,944.43 : x
  2. Step 2: Convert to fraction form
    643,424.34/887,926.64 = 356,944.43/x
  3. Step 3: Cross multiply
    643,424.34x = 887,926.64 × 356,944.43
  4. Step 4: Simplify right side
    643,424.34x = 316,940,468,831.71
  5. Step 5: Solve for x
    x = 316,940,468,831.71/643,424.34
  6. Step 6: Final answer
    x = 492,583.90

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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.