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Finding the Fourth Proportional to 318,679.86, 478,315.17 and 161,019.12

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Solution

The fourth proportional to 318,679.86, 478,315.17 and 161,019.12 is: 241,677.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,679.86 : 478,315.17 = 161,019.12 : x
  2. Step 2: Convert to fraction form
    318,679.86/478,315.17 = 161,019.12/x
  3. Step 3: Cross multiply
    318,679.86x = 478,315.17 × 161,019.12
  4. Step 4: Simplify right side
    318,679.86x = 77,017,887,756.05
  5. Step 5: Solve for x
    x = 77,017,887,756.05/318,679.86
  6. Step 6: Final answer
    x = 241,677.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.