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Finding the Fourth Proportional to 709,561.48, 979,187.28 and 387,268.96

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Solution

The fourth proportional to 709,561.48, 979,187.28 and 387,268.96 is: 534,427.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,561.48 : 979,187.28 = 387,268.96 : x
  2. Step 2: Convert to fraction form
    709,561.48/979,187.28 = 387,268.96/x
  3. Step 3: Cross multiply
    709,561.48x = 979,187.28 × 387,268.96
  4. Step 4: Simplify right side
    709,561.48x = 379,208,839,570.83
  5. Step 5: Solve for x
    x = 379,208,839,570.83/709,561.48
  6. Step 6: Final answer
    x = 534,427.04

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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.