Home / 645,469.20-890,758.94-358,989.42

Finding the Fourth Proportional to 645,469.20, 890,758.94 and 358,989.42

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Solution

The fourth proportional to 645,469.20, 890,758.94 and 358,989.42 is: 495,411.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,469.20 : 890,758.94 = 358,989.42 : x
  2. Step 2: Convert to fraction form
    645,469.20/890,758.94 = 358,989.42/x
  3. Step 3: Cross multiply
    645,469.20x = 890,758.94 × 358,989.42
  4. Step 4: Simplify right side
    645,469.20x = 319,773,035,230.42
  5. Step 5: Solve for x
    x = 319,773,035,230.42/645,469.20
  6. Step 6: Final answer
    x = 495,411.76

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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.