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Finding the Fourth Proportional to 536,639.90, 804,959.85 and 387,923.90

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Solution

The fourth proportional to 536,639.90, 804,959.85 and 387,923.90 is: 581,885.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    536,639.90 : 804,959.85 = 387,923.90 : x
  2. Step 2: Convert to fraction form
    536,639.90/804,959.85 = 387,923.90/x
  3. Step 3: Cross multiply
    536,639.90x = 804,959.85 × 387,923.90
  4. Step 4: Simplify right side
    536,639.90x = 312,263,164,355.42
  5. Step 5: Solve for x
    x = 312,263,164,355.42/536,639.90
  6. Step 6: Final answer
    x = 581,885.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.