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Finding the Fourth Proportional to 645,446.46, 890,703.44 and 358,960.38

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Solution

The fourth proportional to 645,446.46, 890,703.44 and 358,960.38 is: 495,358.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,446.46 : 890,703.44 = 358,960.38 : x
  2. Step 2: Convert to fraction form
    645,446.46/890,703.44 = 358,960.38/x
  3. Step 3: Cross multiply
    645,446.46x = 890,703.44 × 358,960.38
  4. Step 4: Simplify right side
    645,446.46x = 319,727,245,289.71
  5. Step 5: Solve for x
    x = 319,727,245,289.71/645,446.46
  6. Step 6: Final answer
    x = 495,358.28

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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.