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Finding the Fourth Proportional to 378,728.10, 522,834.17 and 235,534.28

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Solution

The fourth proportional to 378,728.10, 522,834.17 and 235,534.28 is: 325,155.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,728.10 : 522,834.17 = 235,534.28 : x
  2. Step 2: Convert to fraction form
    378,728.10/522,834.17 = 235,534.28/x
  3. Step 3: Cross multiply
    378,728.10x = 522,834.17 × 235,534.28
  4. Step 4: Simplify right side
    378,728.10x = 123,145,365,998.51
  5. Step 5: Solve for x
    x = 123,145,365,998.51/378,728.10
  6. Step 6: Final answer
    x = 325,155.08

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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.