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Finding the Fourth Proportional to 485,809.29, 670,386.51 and 268,020.77

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Solution

The fourth proportional to 485,809.29, 670,386.51 and 268,020.77 is: 369,851.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,809.29 : 670,386.51 = 268,020.77 : x
  2. Step 2: Convert to fraction form
    485,809.29/670,386.51 = 268,020.77/x
  3. Step 3: Cross multiply
    485,809.29x = 670,386.51 × 268,020.77
  4. Step 4: Simplify right side
    485,809.29x = 179,677,505,255.88
  5. Step 5: Solve for x
    x = 179,677,505,255.88/485,809.29
  6. Step 6: Final answer
    x = 369,851.93

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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.