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Finding the Fourth Proportional to 645,358.07, 890,722.22 and 373,513.97

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Solution

The fourth proportional to 645,358.07, 890,722.22 and 373,513.97 is: 515,523.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,358.07 : 890,722.22 = 373,513.97 : x
  2. Step 2: Convert to fraction form
    645,358.07/890,722.22 = 373,513.97/x
  3. Step 3: Cross multiply
    645,358.07x = 890,722.22 × 373,513.97
  4. Step 4: Simplify right side
    645,358.07x = 332,697,186,238.23
  5. Step 5: Solve for x
    x = 332,697,186,238.23/645,358.07
  6. Step 6: Final answer
    x = 515,523.40

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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.