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Finding the Fourth Proportional to 640,186.50, 883,492.80 and 353,700.43

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Solution

The fourth proportional to 640,186.50, 883,492.80 and 353,700.43 is: 488,126.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,186.50 : 883,492.80 = 353,700.43 : x
  2. Step 2: Convert to fraction form
    640,186.50/883,492.80 = 353,700.43/x
  3. Step 3: Cross multiply
    640,186.50x = 883,492.80 × 353,700.43
  4. Step 4: Simplify right side
    640,186.50x = 312,491,783,261.90
  5. Step 5: Solve for x
    x = 312,491,783,261.90/640,186.50
  6. Step 6: Final answer
    x = 488,126.17

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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.