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Finding the Fourth Proportional to 391,652, 540,483.06 and 212,804

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Solution

The fourth proportional to 391,652, 540,483.06 and 212,804 is: 293,671.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,652 : 540,483.06 = 212,804 : x
  2. Step 2: Convert to fraction form
    391,652/540,483.06 = 212,804/x
  3. Step 3: Cross multiply
    391,652x = 540,483.06 × 212,804
  4. Step 4: Simplify right side
    391,652x = 115,016,957,100.24
  5. Step 5: Solve for x
    x = 115,016,957,100.24/391,652
  6. Step 6: Final answer
    x = 293,671.31

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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.