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Finding the Fourth Proportional to 640,948.63, 884,410.85 and 368,963.97

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Solution

The fourth proportional to 640,948.63, 884,410.85 and 368,963.97 is: 509,113.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,948.63 : 884,410.85 = 368,963.97 : x
  2. Step 2: Convert to fraction form
    640,948.63/884,410.85 = 368,963.97/x
  3. Step 3: Cross multiply
    640,948.63x = 884,410.85 × 368,963.97
  4. Step 4: Simplify right side
    640,948.63x = 326,315,738,327.07
  5. Step 5: Solve for x
    x = 326,315,738,327.07/640,948.63
  6. Step 6: Final answer
    x = 509,113.72

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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.