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Finding the Fourth Proportional to 687,853.25, 949,237.49 and 386,047.25

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Solution

The fourth proportional to 687,853.25, 949,237.49 and 386,047.25 is: 532,745.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,853.25 : 949,237.49 = 386,047.25 : x
  2. Step 2: Convert to fraction form
    687,853.25/949,237.49 = 386,047.25/x
  3. Step 3: Cross multiply
    687,853.25x = 949,237.49 × 386,047.25
  4. Step 4: Simplify right side
    687,853.25x = 366,450,520,681.17
  5. Step 5: Solve for x
    x = 366,450,520,681.17/687,853.25
  6. Step 6: Final answer
    x = 532,745.21

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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.