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Finding the Fourth Proportional to 641,605.16, 885,315.96 and 369,619.76

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Solution

The fourth proportional to 641,605.16, 885,315.96 and 369,619.76 is: 510,018.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,605.16 : 885,315.96 = 369,619.76 : x
  2. Step 2: Convert to fraction form
    641,605.16/885,315.96 = 369,619.76/x
  3. Step 3: Cross multiply
    641,605.16x = 885,315.96 × 369,619.76
  4. Step 4: Simplify right side
    641,605.16x = 327,230,272,659.37
  5. Step 5: Solve for x
    x = 327,230,272,659.37/641,605.16
  6. Step 6: Final answer
    x = 510,018.14

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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.