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Finding the Fourth Proportional to 521,325.79, 719,490.20 and 317,496.17

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Solution

The fourth proportional to 521,325.79, 719,490.20 and 317,496.17 is: 438,181.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,325.79 : 719,490.20 = 317,496.17 : x
  2. Step 2: Convert to fraction form
    521,325.79/719,490.20 = 317,496.17/x
  3. Step 3: Cross multiply
    521,325.79x = 719,490.20 × 317,496.17
  4. Step 4: Simplify right side
    521,325.79x = 228,435,383,063.78
  5. Step 5: Solve for x
    x = 228,435,383,063.78/521,325.79
  6. Step 6: Final answer
    x = 438,181.63

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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.