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Finding the Fourth Proportional to 587,640.40, 811,117.02 and 383,723

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Solution

The fourth proportional to 587,640.40, 811,117.02 and 383,723 is: 529,650.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,640.40 : 811,117.02 = 383,723 : x
  2. Step 2: Convert to fraction form
    587,640.40/811,117.02 = 383,723/x
  3. Step 3: Cross multiply
    587,640.40x = 811,117.02 × 383,723
  4. Step 4: Simplify right side
    587,640.40x = 311,244,256,265.46
  5. Step 5: Solve for x
    x = 311,244,256,265.46/587,640.40
  6. Step 6: Final answer
    x = 529,650.88

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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.