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Finding the Fourth Proportional to 427,203.40, 640,862.70 and 146,806.60

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Solution

The fourth proportional to 427,203.40, 640,862.70 and 146,806.60 is: 220,229.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,203.40 : 640,862.70 = 146,806.60 : x
  2. Step 2: Convert to fraction form
    427,203.40/640,862.70 = 146,806.60/x
  3. Step 3: Cross multiply
    427,203.40x = 640,862.70 × 146,806.60
  4. Step 4: Simplify right side
    427,203.40x = 94,082,874,053.82
  5. Step 5: Solve for x
    x = 94,082,874,053.82/427,203.40
  6. Step 6: Final answer
    x = 220,229.69

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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.