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Finding the Fourth Proportional to 640,078.60, 883,295.76 and 353,596

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Solution

The fourth proportional to 640,078.60, 883,295.76 and 353,596 is: 487,955.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,078.60 : 883,295.76 = 353,596 : x
  2. Step 2: Convert to fraction form
    640,078.60/883,295.76 = 353,596/x
  3. Step 3: Cross multiply
    640,078.60x = 883,295.76 × 353,596
  4. Step 4: Simplify right side
    640,078.60x = 312,329,847,552.96
  5. Step 5: Solve for x
    x = 312,329,847,552.96/640,078.60
  6. Step 6: Final answer
    x = 487,955.46

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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.