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Finding the Fourth Proportional to 370,820.20, 556,230.30 and 221,229.40

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Solution

The fourth proportional to 370,820.20, 556,230.30 and 221,229.40 is: 331,844.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,820.20 : 556,230.30 = 221,229.40 : x
  2. Step 2: Convert to fraction form
    370,820.20/556,230.30 = 221,229.40/x
  3. Step 3: Cross multiply
    370,820.20x = 556,230.30 × 221,229.40
  4. Step 4: Simplify right side
    370,820.20x = 123,054,495,530.82
  5. Step 5: Solve for x
    x = 123,054,495,530.82/370,820.20
  6. Step 6: Final answer
    x = 331,844.10

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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.