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Finding the Fourth Proportional to 310,351.50, 428,285.48 and 176,215.50

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Solution

The fourth proportional to 310,351.50, 428,285.48 and 176,215.50 is: 243,177.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,351.50 : 428,285.48 = 176,215.50 : x
  2. Step 2: Convert to fraction form
    310,351.50/428,285.48 = 176,215.50/x
  3. Step 3: Cross multiply
    310,351.50x = 428,285.48 × 176,215.50
  4. Step 4: Simplify right side
    310,351.50x = 75,470,539,119.86
  5. Step 5: Solve for x
    x = 75,470,539,119.86/310,351.50
  6. Step 6: Final answer
    x = 243,177.62

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1.5x scale

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.