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Finding the Fourth Proportional to 318,715.29, 478,068.62 and 108,499.77

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Solution

The fourth proportional to 318,715.29, 478,068.62 and 108,499.77 is: 162,748.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,715.29 : 478,068.62 = 108,499.77 : x
  2. Step 2: Convert to fraction form
    318,715.29/478,068.62 = 108,499.77/x
  3. Step 3: Cross multiply
    318,715.29x = 478,068.62 × 108,499.77
  4. Step 4: Simplify right side
    318,715.29x = 51,870,334,771.72
  5. Step 5: Solve for x
    x = 51,870,334,771.72/318,715.29
  6. Step 6: Final answer
    x = 162,748.18

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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.