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Finding the Fourth Proportional to 210,396.80, 314,980.80 and 188,278.40

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Solution

The fourth proportional to 210,396.80, 314,980.80 and 188,278.40 is: 281,867.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,396.80 : 314,980.80 = 188,278.40 : x
  2. Step 2: Convert to fraction form
    210,396.80/314,980.80 = 188,278.40/x
  3. Step 3: Cross multiply
    210,396.80x = 314,980.80 × 188,278.40
  4. Step 4: Simplify right side
    210,396.80x = 59,304,081,054.72
  5. Step 5: Solve for x
    x = 59,304,081,054.72/210,396.80
  6. Step 6: Final answer
    x = 281,867.79

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1.5x scale

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.