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Finding the Fourth Proportional to 210,016.60, 315,024.90 and 200,831.20

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Solution

The fourth proportional to 210,016.60, 315,024.90 and 200,831.20 is: 301,246.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,016.60 : 315,024.90 = 200,831.20 : x
  2. Step 2: Convert to fraction form
    210,016.60/315,024.90 = 200,831.20/x
  3. Step 3: Cross multiply
    210,016.60x = 315,024.90 × 200,831.20
  4. Step 4: Simplify right side
    210,016.60x = 63,266,828,696.88
  5. Step 5: Solve for x
    x = 63,266,828,696.88/210,016.60
  6. Step 6: Final answer
    x = 301,246.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.