Home / 386,575.05-579,880.83-318,981.72

Finding the Fourth Proportional to 386,575.05, 579,880.83 and 318,981.72

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Solution

The fourth proportional to 386,575.05, 579,880.83 and 318,981.72 is: 478,487.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,575.05 : 579,880.83 = 318,981.72 : x
  2. Step 2: Convert to fraction form
    386,575.05/579,880.83 = 318,981.72/x
  3. Step 3: Cross multiply
    386,575.05x = 579,880.83 × 318,981.72
  4. Step 4: Simplify right side
    386,575.05x = 184,971,384,548.43
  5. Step 5: Solve for x
    x = 184,971,384,548.43/386,575.05
  6. Step 6: Final answer
    x = 478,487.64

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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.