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Finding the Fourth Proportional to 318,219.85, 439,159.18 and 197,400.07

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Solution

The fourth proportional to 318,219.85, 439,159.18 and 197,400.07 is: 272,421.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,219.85 : 439,159.18 = 197,400.07 : x
  2. Step 2: Convert to fraction form
    318,219.85/439,159.18 = 197,400.07/x
  3. Step 3: Cross multiply
    318,219.85x = 439,159.18 × 197,400.07
  4. Step 4: Simplify right side
    318,219.85x = 86,690,052,873.14
  5. Step 5: Solve for x
    x = 86,690,052,873.14/318,219.85
  6. Step 6: Final answer
    x = 272,421.89

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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.