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Finding the Fourth Proportional to 633,726.04, 874,458.78 and 378,984.28

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Solution

The fourth proportional to 633,726.04, 874,458.78 and 378,984.28 is: 522,948.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,726.04 : 874,458.78 = 378,984.28 : x
  2. Step 2: Convert to fraction form
    633,726.04/874,458.78 = 378,984.28/x
  3. Step 3: Cross multiply
    633,726.04x = 874,458.78 × 378,984.28
  4. Step 4: Simplify right side
    633,726.04x = 331,406,131,127.98
  5. Step 5: Solve for x
    x = 331,406,131,127.98/633,726.04
  6. Step 6: Final answer
    x = 522,948.58

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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.