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Finding the Fourth Proportional to 318,871.80, 440,074.14 and 238,159.20

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Solution

The fourth proportional to 318,871.80, 440,074.14 and 238,159.20 is: 328,682.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,871.80 : 440,074.14 = 238,159.20 : x
  2. Step 2: Convert to fraction form
    318,871.80/440,074.14 = 238,159.20/x
  3. Step 3: Cross multiply
    318,871.80x = 440,074.14 × 238,159.20
  4. Step 4: Simplify right side
    318,871.80x = 104,807,705,123.09
  5. Step 5: Solve for x
    x = 104,807,705,123.09/318,871.80
  6. Step 6: Final answer
    x = 328,682.89

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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.