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Finding the Fourth Proportional to 675,376.64, 936,281.84 and 639,422.72

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Solution

The fourth proportional to 675,376.64, 936,281.84 and 639,422.72 is: 886,438.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,376.64 : 936,281.84 = 639,422.72 : x
  2. Step 2: Convert to fraction form
    675,376.64/936,281.84 = 639,422.72/x
  3. Step 3: Cross multiply
    675,376.64x = 936,281.84 × 639,422.72
  4. Step 4: Simplify right side
    675,376.64x = 598,679,880,819.41
  5. Step 5: Solve for x
    x = 598,679,880,819.41/675,376.64
  6. Step 6: Final answer
    x = 886,438.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.