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Finding the Fourth Proportional to 290,778.02, 401,224.76 and 161,699.57

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Solution

The fourth proportional to 290,778.02, 401,224.76 and 161,699.57 is: 223,118.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,778.02 : 401,224.76 = 161,699.57 : x
  2. Step 2: Convert to fraction form
    290,778.02/401,224.76 = 161,699.57/x
  3. Step 3: Cross multiply
    290,778.02x = 401,224.76 × 161,699.57
  4. Step 4: Simplify right side
    290,778.02x = 64,877,871,165.35
  5. Step 5: Solve for x
    x = 64,877,871,165.35/290,778.02
  6. Step 6: Final answer
    x = 223,118.21

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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.