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Finding the Fourth Proportional to 637,100.79, 879,153.78 and 378,963.51

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Solution

The fourth proportional to 637,100.79, 879,153.78 and 378,963.51 is: 522,942.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,100.79 : 879,153.78 = 378,963.51 : x
  2. Step 2: Convert to fraction form
    637,100.79/879,153.78 = 378,963.51/x
  3. Step 3: Cross multiply
    637,100.79x = 879,153.78 × 378,963.51
  4. Step 4: Simplify right side
    637,100.79x = 333,167,202,298.57
  5. Step 5: Solve for x
    x = 333,167,202,298.57/637,100.79
  6. Step 6: Final answer
    x = 522,942.69

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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.