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Finding the Fourth Proportional to 645,446.45, 890,703.45 and 358,960.37

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Solution

The fourth proportional to 645,446.45, 890,703.45 and 358,960.37 is: 495,358.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,446.45 : 890,703.45 = 358,960.37 : x
  2. Step 2: Convert to fraction form
    645,446.45/890,703.45 = 358,960.37/x
  3. Step 3: Cross multiply
    645,446.45x = 890,703.45 × 358,960.37
  4. Step 4: Simplify right side
    645,446.45x = 319,727,239,972.28
  5. Step 5: Solve for x
    x = 319,727,239,972.28/645,446.45
  6. Step 6: Final answer
    x = 495,358.27

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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.