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Finding the Fourth Proportional to 672,574.64, 928,106.49 and 378,268.43

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Solution

The fourth proportional to 672,574.64, 928,106.49 and 378,268.43 is: 521,984.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,574.64 : 928,106.49 = 378,268.43 : x
  2. Step 2: Convert to fraction form
    672,574.64/928,106.49 = 378,268.43/x
  3. Step 3: Cross multiply
    672,574.64x = 928,106.49 × 378,268.43
  4. Step 4: Simplify right side
    672,574.64x = 351,073,387,165.38
  5. Step 5: Solve for x
    x = 351,073,387,165.38/672,574.64
  6. Step 6: Final answer
    x = 521,984.28

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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.