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Finding the Fourth Proportional to 476,626.72, 714,939.51 and 121,640.78

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Solution

The fourth proportional to 476,626.72, 714,939.51 and 121,640.78 is: 182,461.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,626.72 : 714,939.51 = 121,640.78 : x
  2. Step 2: Convert to fraction form
    476,626.72/714,939.51 = 121,640.78/x
  3. Step 3: Cross multiply
    476,626.72x = 714,939.51 × 121,640.78
  4. Step 4: Simplify right side
    476,626.72x = 86,965,799,041.01
  5. Step 5: Solve for x
    x = 86,965,799,041.01/476,626.72
  6. Step 6: Final answer
    x = 182,461.02

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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.