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Finding the Fourth Proportional to 427,390.61, 640,519.63 and 227,280.11

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Solution

The fourth proportional to 427,390.61, 640,519.63 and 227,280.11 is: 340,619.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,390.61 : 640,519.63 = 227,280.11 : x
  2. Step 2: Convert to fraction form
    427,390.61/640,519.63 = 227,280.11/x
  3. Step 3: Cross multiply
    427,390.61x = 640,519.63 × 227,280.11
  4. Step 4: Simplify right side
    427,390.61x = 145,577,368,192.76
  5. Step 5: Solve for x
    x = 145,577,368,192.76/427,390.61
  6. Step 6: Final answer
    x = 340,619.02

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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.