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Finding the Fourth Proportional to 645,696.88, 891,073.68 and 359,243.62

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Solution

The fourth proportional to 645,696.88, 891,073.68 and 359,243.62 is: 495,762.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,696.88 : 891,073.68 = 359,243.62 : x
  2. Step 2: Convert to fraction form
    645,696.88/891,073.68 = 359,243.62/x
  3. Step 3: Cross multiply
    645,696.88x = 891,073.68 × 359,243.62
  4. Step 4: Simplify right side
    645,696.88x = 320,112,534,489.92
  5. Step 5: Solve for x
    x = 320,112,534,489.92/645,696.88
  6. Step 6: Final answer
    x = 495,762.86

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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.