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Finding the Fourth Proportional to 318,870.96, 440,025.31 and 198,009.65

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Solution

The fourth proportional to 318,870.96, 440,025.31 and 198,009.65 is: 273,242.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,870.96 : 440,025.31 = 198,009.65 : x
  2. Step 2: Convert to fraction form
    318,870.96/440,025.31 = 198,009.65/x
  3. Step 3: Cross multiply
    318,870.96x = 440,025.31 × 198,009.65
  4. Step 4: Simplify right side
    318,870.96x = 87,129,254,434.07
  5. Step 5: Solve for x
    x = 87,129,254,434.07/318,870.96
  6. Step 6: Final answer
    x = 273,242.99

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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.