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Finding the Fourth Proportional to 645,695.88, 891,072.30 and 359,242.62

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Solution

The fourth proportional to 645,695.88, 891,072.30 and 359,242.62 is: 495,761.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,695.88 : 891,072.30 = 359,242.62 : x
  2. Step 2: Convert to fraction form
    645,695.88/891,072.30 = 359,242.62/x
  3. Step 3: Cross multiply
    645,695.88x = 891,072.30 × 359,242.62
  4. Step 4: Simplify right side
    645,695.88x = 320,111,147,661.43
  5. Step 5: Solve for x
    x = 320,111,147,661.43/645,695.88
  6. Step 6: Final answer
    x = 495,761.48

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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.