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Finding the Fourth Proportional to 489,521.22, 675,707.85 and 308,538.06

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Solution

The fourth proportional to 489,521.22, 675,707.85 and 308,538.06 is: 425,888.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,521.22 : 675,707.85 = 308,538.06 : x
  2. Step 2: Convert to fraction form
    489,521.22/675,707.85 = 308,538.06/x
  3. Step 3: Cross multiply
    489,521.22x = 675,707.85 × 308,538.06
  4. Step 4: Simplify right side
    489,521.22x = 208,481,589,165.77
  5. Step 5: Solve for x
    x = 208,481,589,165.77/489,521.22
  6. Step 6: Final answer
    x = 425,888.77

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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.