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Finding the Fourth Proportional to 253,405.40, 349,699.59 and 138,683.97

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Solution

The fourth proportional to 253,405.40, 349,699.59 and 138,683.97 is: 191,383.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,405.40 : 349,699.59 = 138,683.97 : x
  2. Step 2: Convert to fraction form
    253,405.40/349,699.59 = 138,683.97/x
  3. Step 3: Cross multiply
    253,405.40x = 349,699.59 × 138,683.97
  4. Step 4: Simplify right side
    253,405.40x = 48,497,728,779.70
  5. Step 5: Solve for x
    x = 48,497,728,779.70/253,405.40
  6. Step 6: Final answer
    x = 191,383.96

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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.