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Finding the Fourth Proportional to 218,917.80, 328,376.70 and 52,705.80

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Solution

The fourth proportional to 218,917.80, 328,376.70 and 52,705.80 is: 79,058.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,917.80 : 328,376.70 = 52,705.80 : x
  2. Step 2: Convert to fraction form
    218,917.80/328,376.70 = 52,705.80/x
  3. Step 3: Cross multiply
    218,917.80x = 328,376.70 × 52,705.80
  4. Step 4: Simplify right side
    218,917.80x = 17,307,356,674.86
  5. Step 5: Solve for x
    x = 17,307,356,674.86/218,917.80
  6. Step 6: Final answer
    x = 79,058.70

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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.