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Finding the Fourth Proportional to 645,446.96, 890,704.10 and 358,960.90

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Solution

The fourth proportional to 645,446.96, 890,704.10 and 358,960.90 is: 495,358.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,446.96 : 890,704.10 = 358,960.90 : x
  2. Step 2: Convert to fraction form
    645,446.96/890,704.10 = 358,960.90/x
  3. Step 3: Cross multiply
    645,446.96x = 890,704.10 × 358,960.90
  4. Step 4: Simplify right side
    645,446.96x = 319,727,945,369.69
  5. Step 5: Solve for x
    x = 319,727,945,369.69/645,446.96
  6. Step 6: Final answer
    x = 495,358.98

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1.5x scale

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.