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Finding the Fourth Proportional to 645,648.50, 890,952.81 and 359,158.34

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Solution

The fourth proportional to 645,648.50, 890,952.81 and 359,158.34 is: 495,615.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,648.50 : 890,952.81 = 359,158.34 : x
  2. Step 2: Convert to fraction form
    645,648.50/890,952.81 = 359,158.34/x
  3. Step 3: Cross multiply
    645,648.50x = 890,952.81 × 359,158.34
  4. Step 4: Simplify right side
    645,648.50x = 319,993,132,257.94
  5. Step 5: Solve for x
    x = 319,993,132,257.94/645,648.50
  6. Step 6: Final answer
    x = 495,615.08

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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.