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Finding the Fourth Proportional to 640,348.37, 883,645.95 and 353,850

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Solution

The fourth proportional to 640,348.37, 883,645.95 and 353,850 is: 488,293.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,348.37 : 883,645.95 = 353,850 : x
  2. Step 2: Convert to fraction form
    640,348.37/883,645.95 = 353,850/x
  3. Step 3: Cross multiply
    640,348.37x = 883,645.95 × 353,850
  4. Step 4: Simplify right side
    640,348.37x = 312,678,119,407.50
  5. Step 5: Solve for x
    x = 312,678,119,407.50/640,348.37
  6. Step 6: Final answer
    x = 488,293.77

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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.