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Finding the Fourth Proportional to 1,178,147, 1,625,842.86 and 641,603

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Solution

The fourth proportional to 1,178,147, 1,625,842.86 and 641,603 is: 885,412.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178,147 : 1,625,842.86 = 641,603 : x
  2. Step 2: Convert to fraction form
    1,178,147/1,625,842.86 = 641,603/x
  3. Step 3: Cross multiply
    1,178,147x = 1,625,842.86 × 641,603
  4. Step 4: Simplify right side
    1,178,147x = 1,043,145,656,504.58
  5. Step 5: Solve for x
    x = 1,043,145,656,504.58/1,178,147
  6. Step 6: Final answer
    x = 885,412.14

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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.