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Finding the Fourth Proportional to 455,818.80, 683,728.68 and 118,859.16

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Solution

The fourth proportional to 455,818.80, 683,728.68 and 118,859.16 is: 178,288.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,818.80 : 683,728.68 = 118,859.16 : x
  2. Step 2: Convert to fraction form
    455,818.80/683,728.68 = 118,859.16/x
  3. Step 3: Cross multiply
    455,818.80x = 683,728.68 × 118,859.16
  4. Step 4: Simplify right side
    455,818.80x = 81,267,416,572.71
  5. Step 5: Solve for x
    x = 81,267,416,572.71/455,818.80
  6. Step 6: Final answer
    x = 178,288.87

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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.