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Finding the Fourth Proportional to 639,215.56, 958,574.10 and 239,638.54

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Solution

The fourth proportional to 639,215.56, 958,574.10 and 239,638.54 is: 359,364.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,215.56 : 958,574.10 = 239,638.54 : x
  2. Step 2: Convert to fraction form
    639,215.56/958,574.10 = 239,638.54/x
  3. Step 3: Cross multiply
    639,215.56x = 958,574.10 × 239,638.54
  4. Step 4: Simplify right side
    639,215.56x = 229,711,297,805.81
  5. Step 5: Solve for x
    x = 229,711,297,805.81/639,215.56
  6. Step 6: Final answer
    x = 359,364.37

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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.