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Finding the Fourth Proportional to 370,919.70, 555,723.45 and 318,431.70

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Solution

The fourth proportional to 370,919.70, 555,723.45 and 318,431.70 is: 477,084.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,919.70 : 555,723.45 = 318,431.70 : x
  2. Step 2: Convert to fraction form
    370,919.70/555,723.45 = 318,431.70/x
  3. Step 3: Cross multiply
    370,919.70x = 555,723.45 × 318,431.70
  4. Step 4: Simplify right side
    370,919.70x = 176,959,962,913.37
  5. Step 5: Solve for x
    x = 176,959,962,913.37/370,919.70
  6. Step 6: Final answer
    x = 477,084.29

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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.