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Finding the Fourth Proportional to 329,980.45, 455,379.83 and 186,740.45

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Solution

The fourth proportional to 329,980.45, 455,379.83 and 186,740.45 is: 257,705.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,980.45 : 455,379.83 = 186,740.45 : x
  2. Step 2: Convert to fraction form
    329,980.45/455,379.83 = 186,740.45/x
  3. Step 3: Cross multiply
    329,980.45x = 455,379.83 × 186,740.45
  4. Step 4: Simplify right side
    329,980.45x = 85,037,834,841.97
  5. Step 5: Solve for x
    x = 85,037,834,841.97/329,980.45
  6. Step 6: Final answer
    x = 257,705.68

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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.