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Finding the Fourth Proportional to 318,465.54, 440,112.96 and 261,014.40

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Solution

The fourth proportional to 318,465.54, 440,112.96 and 261,014.40 is: 360,716.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,465.54 : 440,112.96 = 261,014.40 : x
  2. Step 2: Convert to fraction form
    318,465.54/440,112.96 = 261,014.40/x
  3. Step 3: Cross multiply
    318,465.54x = 440,112.96 × 261,014.40
  4. Step 4: Simplify right side
    318,465.54x = 114,875,820,186.62
  5. Step 5: Solve for x
    x = 114,875,820,186.62/318,465.54
  6. Step 6: Final answer
    x = 360,716.64

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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.