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Finding the Fourth Proportional to 212,434, 318,651 and 64,690

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Solution

The fourth proportional to 212,434, 318,651 and 64,690 is: 97,035

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,434 : 318,651 = 64,690 : x
  2. Step 2: Convert to fraction form
    212,434/318,651 = 64,690/x
  3. Step 3: Cross multiply
    212,434x = 318,651 × 64,690
  4. Step 4: Simplify right side
    212,434x = 20,613,533,190
  5. Step 5: Solve for x
    x = 20,613,533,190/212,434
  6. Step 6: Final answer
    x = 97,035

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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.