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Finding the Fourth Proportional to 640,672.27, 884,146.19 and 354,210.81

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Solution

The fourth proportional to 640,672.27, 884,146.19 and 354,210.81 is: 488,821.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,672.27 : 884,146.19 = 354,210.81 : x
  2. Step 2: Convert to fraction form
    640,672.27/884,146.19 = 354,210.81/x
  3. Step 3: Cross multiply
    640,672.27x = 884,146.19 × 354,210.81
  4. Step 4: Simplify right side
    640,672.27x = 313,174,138,118.31
  5. Step 5: Solve for x
    x = 313,174,138,118.31/640,672.27
  6. Step 6: Final answer
    x = 488,821.12

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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.