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Finding the Fourth Proportional to 279,621.06, 385,894.62 and 158,716.32

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Solution

The fourth proportional to 279,621.06, 385,894.62 and 158,716.32 is: 219,038.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,621.06 : 385,894.62 = 158,716.32 : x
  2. Step 2: Convert to fraction form
    279,621.06/385,894.62 = 158,716.32/x
  3. Step 3: Cross multiply
    279,621.06x = 385,894.62 × 158,716.32
  4. Step 4: Simplify right side
    279,621.06x = 61,247,773,994.20
  5. Step 5: Solve for x
    x = 61,247,773,994.20/279,621.06
  6. Step 6: Final answer
    x = 219,038.49

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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.