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Finding the Fourth Proportional to 403,002.75, 556,143.77 and 221,710.78

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Solution

The fourth proportional to 403,002.75, 556,143.77 and 221,710.78 is: 305,960.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,002.75 : 556,143.77 = 221,710.78 : x
  2. Step 2: Convert to fraction form
    403,002.75/556,143.77 = 221,710.78/x
  3. Step 3: Cross multiply
    403,002.75x = 556,143.77 × 221,710.78
  4. Step 4: Simplify right side
    403,002.75x = 123,303,068,202.76
  5. Step 5: Solve for x
    x = 123,303,068,202.76/403,002.75
  6. Step 6: Final answer
    x = 305,960.86

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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.