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Finding the Fourth Proportional to 671,218.14, 926,322.40 and 384,781.30

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Solution

The fourth proportional to 671,218.14, 926,322.40 and 384,781.30 is: 531,021.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,218.14 : 926,322.40 = 384,781.30 : x
  2. Step 2: Convert to fraction form
    671,218.14/926,322.40 = 384,781.30/x
  3. Step 3: Cross multiply
    671,218.14x = 926,322.40 × 384,781.30
  4. Step 4: Simplify right side
    671,218.14x = 356,431,537,291.12
  5. Step 5: Solve for x
    x = 356,431,537,291.12/671,218.14
  6. Step 6: Final answer
    x = 531,021.91

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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.