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Finding the Fourth Proportional to 640,784.64, 884,247.12 and 354,287.52

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Solution

The fourth proportional to 640,784.64, 884,247.12 and 354,287.52 is: 488,897.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,784.64 : 884,247.12 = 354,287.52 : x
  2. Step 2: Convert to fraction form
    640,784.64/884,247.12 = 354,287.52/x
  3. Step 3: Cross multiply
    640,784.64x = 884,247.12 × 354,287.52
  4. Step 4: Simplify right side
    640,784.64x = 313,277,719,211.94
  5. Step 5: Solve for x
    x = 313,277,719,211.94/640,784.64
  6. Step 6: Final answer
    x = 488,897.05

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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.