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Finding the Fourth Proportional to 318,737.81, 439,859.49 and 191,415.53

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Solution

The fourth proportional to 318,737.81, 439,859.49 and 191,415.53 is: 264,154.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,737.81 : 439,859.49 = 191,415.53 : x
  2. Step 2: Convert to fraction form
    318,737.81/439,859.49 = 191,415.53/x
  3. Step 3: Cross multiply
    318,737.81x = 439,859.49 × 191,415.53
  4. Step 4: Simplify right side
    318,737.81x = 84,195,937,403.88
  5. Step 5: Solve for x
    x = 84,195,937,403.88/318,737.81
  6. Step 6: Final answer
    x = 264,154.22

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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.