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Finding the Fourth Proportional to 817,371.63, 1,127,978.42 and 454,810.77

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Solution

The fourth proportional to 817,371.63, 1,127,978.42 and 454,810.77 is: 627,641.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,371.63 : 1,127,978.42 = 454,810.77 : x
  2. Step 2: Convert to fraction form
    817,371.63/1,127,978.42 = 454,810.77/x
  3. Step 3: Cross multiply
    817,371.63x = 1,127,978.42 × 454,810.77
  4. Step 4: Simplify right side
    817,371.63x = 513,016,731,469.53
  5. Step 5: Solve for x
    x = 513,016,731,469.53/817,371.63
  6. Step 6: Final answer
    x = 627,641.96

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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.