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Finding the Fourth Proportional to 386,059, 532,783.30 and 216,347.80

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Solution

The fourth proportional to 386,059, 532,783.30 and 216,347.80 is: 298,572.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,059 : 532,783.30 = 216,347.80 : x
  2. Step 2: Convert to fraction form
    386,059/532,783.30 = 216,347.80/x
  3. Step 3: Cross multiply
    386,059x = 532,783.30 × 216,347.80
  4. Step 4: Simplify right side
    386,059x = 115,266,494,831.74
  5. Step 5: Solve for x
    x = 115,266,494,831.74/386,059
  6. Step 6: Final answer
    x = 298,572.23

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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.