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Finding the Fourth Proportional to 310,325.76, 428,249.94 and 176,189.76

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Solution

The fourth proportional to 310,325.76, 428,249.94 and 176,189.76 is: 243,142.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,325.76 : 428,249.94 = 176,189.76 : x
  2. Step 2: Convert to fraction form
    310,325.76/428,249.94 = 176,189.76/x
  3. Step 3: Cross multiply
    310,325.76x = 428,249.94 × 176,189.76
  4. Step 4: Simplify right side
    310,325.76x = 75,453,254,148.61
  5. Step 5: Solve for x
    x = 75,453,254,148.61/310,325.76
  6. Step 6: Final answer
    x = 243,142.09

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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.