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Finding the Fourth Proportional to 640,308.68, 883,626.30 and 353,828.77

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Solution

The fourth proportional to 640,308.68, 883,626.30 and 353,828.77 is: 488,283.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,308.68 : 883,626.30 = 353,828.77 : x
  2. Step 2: Convert to fraction form
    640,308.68/883,626.30 = 353,828.77/x
  3. Step 3: Cross multiply
    640,308.68x = 883,626.30 × 353,828.77
  4. Step 4: Simplify right side
    640,308.68x = 312,652,402,890.44
  5. Step 5: Solve for x
    x = 312,652,402,890.44/640,308.68
  6. Step 6: Final answer
    x = 488,283.87

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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.