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Finding the Fourth Proportional to 245,647.64, 338,975.34 and 138,196.88

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Solution

The fourth proportional to 245,647.64, 338,975.34 and 138,196.88 is: 190,701.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,647.64 : 338,975.34 = 138,196.88 : x
  2. Step 2: Convert to fraction form
    245,647.64/338,975.34 = 138,196.88/x
  3. Step 3: Cross multiply
    245,647.64x = 338,975.34 × 138,196.88
  4. Step 4: Simplify right side
    245,647.64x = 46,845,334,384.94
  5. Step 5: Solve for x
    x = 46,845,334,384.94/245,647.64
  6. Step 6: Final answer
    x = 190,701.34

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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.