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Finding the Fourth Proportional to 645,717.88, 891,102.60 and 359,264.68

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Solution

The fourth proportional to 645,717.88, 891,102.60 and 359,264.68 is: 495,791.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,717.88 : 891,102.60 = 359,264.68 : x
  2. Step 2: Convert to fraction form
    645,717.88/891,102.60 = 359,264.68/x
  3. Step 3: Cross multiply
    645,717.88x = 891,102.60 × 359,264.68
  4. Step 4: Simplify right side
    645,717.88x = 320,141,690,436.17
  5. Step 5: Solve for x
    x = 320,141,690,436.17/645,717.88
  6. Step 6: Final answer
    x = 495,791.89

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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.