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Finding the Fourth Proportional to 385,887.60, 578,485.80 and 252,831.60

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Solution

The fourth proportional to 385,887.60, 578,485.80 and 252,831.60 is: 379,020.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,887.60 : 578,485.80 = 252,831.60 : x
  2. Step 2: Convert to fraction form
    385,887.60/578,485.80 = 252,831.60/x
  3. Step 3: Cross multiply
    385,887.60x = 578,485.80 × 252,831.60
  4. Step 4: Simplify right side
    385,887.60x = 146,259,490,391.28
  5. Step 5: Solve for x
    x = 146,259,490,391.28/385,887.60
  6. Step 6: Final answer
    x = 379,020.96

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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.