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Finding the Fourth Proportional to 645,744.45, 891,127.80 and 359,264.73

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Solution

The fourth proportional to 645,744.45, 891,127.80 and 359,264.73 is: 495,785.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,744.45 : 891,127.80 = 359,264.73 : x
  2. Step 2: Convert to fraction form
    645,744.45/891,127.80 = 359,264.73/x
  3. Step 3: Cross multiply
    645,744.45x = 891,127.80 × 359,264.73
  4. Step 4: Simplify right side
    645,744.45x = 320,150,788,462.49
  5. Step 5: Solve for x
    x = 320,150,788,462.49/645,744.45
  6. Step 6: Final answer
    x = 495,785.58

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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.