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Finding the Fourth Proportional to 640,948.60, 884,410.81 and 368,963.94

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Solution

The fourth proportional to 640,948.60, 884,410.81 and 368,963.94 is: 509,113.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,948.60 : 884,410.81 = 368,963.94 : x
  2. Step 2: Convert to fraction form
    640,948.60/884,410.81 = 368,963.94/x
  3. Step 3: Cross multiply
    640,948.60x = 884,410.81 × 368,963.94
  4. Step 4: Simplify right side
    640,948.60x = 326,315,695,180.36
  5. Step 5: Solve for x
    x = 326,315,695,180.36/640,948.60
  6. Step 6: Final answer
    x = 509,113.67

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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.