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Finding the Fourth Proportional to 386,223.16, 532,958.64 and 216,424.48

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Solution

The fourth proportional to 386,223.16, 532,958.64 and 216,424.48 is: 298,649.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,223.16 : 532,958.64 = 216,424.48 : x
  2. Step 2: Convert to fraction form
    386,223.16/532,958.64 = 216,424.48/x
  3. Step 3: Cross multiply
    386,223.16x = 532,958.64 × 216,424.48
  4. Step 4: Simplify right side
    386,223.16x = 115,345,296,523.51
  5. Step 5: Solve for x
    x = 115,345,296,523.51/386,223.16
  6. Step 6: Final answer
    x = 298,649.35

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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.