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Finding the Fourth Proportional to 641,638.86, 885,659.04 and 369,888.51

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Solution

The fourth proportional to 641,638.86, 885,659.04 and 369,888.51 is: 510,559.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,638.86 : 885,659.04 = 369,888.51 : x
  2. Step 2: Convert to fraction form
    641,638.86/885,659.04 = 369,888.51/x
  3. Step 3: Cross multiply
    641,638.86x = 885,659.04 × 369,888.51
  4. Step 4: Simplify right side
    641,638.86x = 327,595,102,673.63
  5. Step 5: Solve for x
    x = 327,595,102,673.63/641,638.86
  6. Step 6: Final answer
    x = 510,559.95

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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.