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Finding the Fourth Proportional to 218,878.60, 328,317.90 and 148,376.20

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Solution

The fourth proportional to 218,878.60, 328,317.90 and 148,376.20 is: 222,564.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,878.60 : 328,317.90 = 148,376.20 : x
  2. Step 2: Convert to fraction form
    218,878.60/328,317.90 = 148,376.20/x
  3. Step 3: Cross multiply
    218,878.60x = 328,317.90 × 148,376.20
  4. Step 4: Simplify right side
    218,878.60x = 48,714,562,393.98
  5. Step 5: Solve for x
    x = 48,714,562,393.98/218,878.60
  6. Step 6: Final answer
    x = 222,564.30

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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.