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Finding the Fourth Proportional to 680,283, 938,791.08 and 378,477

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Solution

The fourth proportional to 680,283, 938,791.08 and 378,477 is: 522,298.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,283 : 938,791.08 = 378,477 : x
  2. Step 2: Convert to fraction form
    680,283/938,791.08 = 378,477/x
  3. Step 3: Cross multiply
    680,283x = 938,791.08 × 378,477
  4. Step 4: Simplify right side
    680,283x = 355,310,831,585.16
  5. Step 5: Solve for x
    x = 355,310,831,585.16/680,283
  6. Step 6: Final answer
    x = 522,298.56

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1.5x scale

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.