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Finding the Fourth Proportional to 354,718.53, 531,126.45 and 221,333.40

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Solution

The fourth proportional to 354,718.53, 531,126.45 and 221,333.40 is: 331,406.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,718.53 : 531,126.45 = 221,333.40 : x
  2. Step 2: Convert to fraction form
    354,718.53/531,126.45 = 221,333.40/x
  3. Step 3: Cross multiply
    354,718.53x = 531,126.45 × 221,333.40
  4. Step 4: Simplify right side
    354,718.53x = 117,556,023,008.43
  5. Step 5: Solve for x
    x = 117,556,023,008.43/354,718.53
  6. Step 6: Final answer
    x = 331,406.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.