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Finding the Fourth Proportional to 386,665.56, 532,386 and 351,236.16

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Solution

The fourth proportional to 386,665.56, 532,386 and 351,236.16 is: 483,604.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,665.56 : 532,386 = 351,236.16 : x
  2. Step 2: Convert to fraction form
    386,665.56/532,386 = 351,236.16/x
  3. Step 3: Cross multiply
    386,665.56x = 532,386 × 351,236.16
  4. Step 4: Simplify right side
    386,665.56x = 186,993,214,277.76
  5. Step 5: Solve for x
    x = 186,993,214,277.76/386,665.56
  6. Step 6: Final answer
    x = 483,604.52

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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.