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Finding the Fourth Proportional to 645,993.60, 891,462.49 and 359,513.61

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Solution

The fourth proportional to 645,993.60, 891,462.49 and 359,513.61 is: 496,123.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,993.60 : 891,462.49 = 359,513.61 : x
  2. Step 2: Convert to fraction form
    645,993.60/891,462.49 = 359,513.61/x
  3. Step 3: Cross multiply
    645,993.60x = 891,462.49 × 359,513.61
  4. Step 4: Simplify right side
    645,993.60x = 320,492,897,959.49
  5. Step 5: Solve for x
    x = 320,492,897,959.49/645,993.60
  6. Step 6: Final answer
    x = 496,123.95

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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.