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Finding the Fourth Proportional to 210,486.16, 290,455.60 and 114,972.56

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Solution

The fourth proportional to 210,486.16, 290,455.60 and 114,972.56 is: 158,653.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,486.16 : 290,455.60 = 114,972.56 : x
  2. Step 2: Convert to fraction form
    210,486.16/290,455.60 = 114,972.56/x
  3. Step 3: Cross multiply
    210,486.16x = 290,455.60 × 114,972.56
  4. Step 4: Simplify right side
    210,486.16x = 33,394,423,898.34
  5. Step 5: Solve for x
    x = 33,394,423,898.34/210,486.16
  6. Step 6: Final answer
    x = 158,653.78

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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.