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Finding the Fourth Proportional to 639,798.24, 959,403.60 and 373,640.16

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Solution

The fourth proportional to 639,798.24, 959,403.60 and 373,640.16 is: 560,288.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,798.24 : 959,403.60 = 373,640.16 : x
  2. Step 2: Convert to fraction form
    639,798.24/959,403.60 = 373,640.16/x
  3. Step 3: Cross multiply
    639,798.24x = 959,403.60 × 373,640.16
  4. Step 4: Simplify right side
    639,798.24x = 358,471,714,608.58
  5. Step 5: Solve for x
    x = 358,471,714,608.58/639,798.24
  6. Step 6: Final answer
    x = 560,288.69

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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.