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Finding the Fourth Proportional to 316,129.89, 474,529.02 and 308,990.70

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Solution

The fourth proportional to 316,129.89, 474,529.02 and 308,990.70 is: 463,812.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,129.89 : 474,529.02 = 308,990.70 : x
  2. Step 2: Convert to fraction form
    316,129.89/474,529.02 = 308,990.70/x
  3. Step 3: Cross multiply
    316,129.89x = 474,529.02 × 308,990.70
  4. Step 4: Simplify right side
    316,129.89x = 146,625,054,060.11
  5. Step 5: Solve for x
    x = 146,625,054,060.11/316,129.89
  6. Step 6: Final answer
    x = 463,812.69

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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.