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Finding the Fourth Proportional to 290,982.81, 401,328.41 and 189,040.91

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Solution

The fourth proportional to 290,982.81, 401,328.41 and 189,040.91 is: 260,728.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,982.81 : 401,328.41 = 189,040.91 : x
  2. Step 2: Convert to fraction form
    290,982.81/401,328.41 = 189,040.91/x
  3. Step 3: Cross multiply
    290,982.81x = 401,328.41 × 189,040.91
  4. Step 4: Simplify right side
    290,982.81x = 75,867,484,883.41
  5. Step 5: Solve for x
    x = 75,867,484,883.41/290,982.81
  6. Step 6: Final answer
    x = 260,728.40

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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.