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Finding the Fourth Proportional to 640,732.96, 884,275.92 and 354,274.72

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Solution

The fourth proportional to 640,732.96, 884,275.92 and 354,274.72 is: 488,934.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,732.96 : 884,275.92 = 354,274.72 : x
  2. Step 2: Convert to fraction form
    640,732.96/884,275.92 = 354,274.72/x
  3. Step 3: Cross multiply
    640,732.96x = 884,275.92 × 354,274.72
  4. Step 4: Simplify right side
    640,732.96x = 313,276,603,960.74
  5. Step 5: Solve for x
    x = 313,276,603,960.74/640,732.96
  6. Step 6: Final answer
    x = 488,934.74

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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.