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Finding the Fourth Proportional to 400,865.42, 601,347.65 and 130,987.19

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Solution

The fourth proportional to 400,865.42, 601,347.65 and 130,987.19 is: 196,496.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,865.42 : 601,347.65 = 130,987.19 : x
  2. Step 2: Convert to fraction form
    400,865.42/601,347.65 = 130,987.19/x
  3. Step 3: Cross multiply
    400,865.42x = 601,347.65 × 130,987.19
  4. Step 4: Simplify right side
    400,865.42x = 78,768,839,735.04
  5. Step 5: Solve for x
    x = 78,768,839,735.04/400,865.42
  6. Step 6: Final answer
    x = 196,496.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.