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Finding the Fourth Proportional to 387,119.40, 580,679.10 and 106,636.20

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Solution

The fourth proportional to 387,119.40, 580,679.10 and 106,636.20 is: 159,954.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,119.40 : 580,679.10 = 106,636.20 : x
  2. Step 2: Convert to fraction form
    387,119.40/580,679.10 = 106,636.20/x
  3. Step 3: Cross multiply
    387,119.40x = 580,679.10 × 106,636.20
  4. Step 4: Simplify right side
    387,119.40x = 61,921,412,643.42
  5. Step 5: Solve for x
    x = 61,921,412,643.42/387,119.40
  6. Step 6: Final answer
    x = 159,954.30

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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.