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Finding the Fourth Proportional to 640,670.20, 884,143.33 and 354,208.74

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Solution

The fourth proportional to 640,670.20, 884,143.33 and 354,208.74 is: 488,818.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,670.20 : 884,143.33 = 354,208.74 : x
  2. Step 2: Convert to fraction form
    640,670.20/884,143.33 = 354,208.74/x
  3. Step 3: Cross multiply
    640,670.20x = 884,143.33 × 354,208.74
  4. Step 4: Simplify right side
    640,670.20x = 313,171,294,898.70
  5. Step 5: Solve for x
    x = 313,171,294,898.70/640,670.20
  6. Step 6: Final answer
    x = 488,818.26

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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.