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Finding the Fourth Proportional to 318,216.74, 439,154.87 and 197,396.94

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Solution

The fourth proportional to 318,216.74, 439,154.87 and 197,396.94 is: 272,417.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,216.74 : 439,154.87 = 197,396.94 : x
  2. Step 2: Convert to fraction form
    318,216.74/439,154.87 = 197,396.94/x
  3. Step 3: Cross multiply
    318,216.74x = 439,154.87 × 197,396.94
  4. Step 4: Simplify right side
    318,216.74x = 86,687,826,537.11
  5. Step 5: Solve for x
    x = 86,687,826,537.11/318,216.74
  6. Step 6: Final answer
    x = 272,417.56

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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.