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Finding the Fourth Proportional to 420,639.50, 630,960.60 and 105,096.44

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Solution

The fourth proportional to 420,639.50, 630,960.60 and 105,096.44 is: 157,645.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,639.50 : 630,960.60 = 105,096.44 : x
  2. Step 2: Convert to fraction form
    420,639.50/630,960.60 = 105,096.44/x
  3. Step 3: Cross multiply
    420,639.50x = 630,960.60 × 105,096.44
  4. Step 4: Simplify right side
    420,639.50x = 66,311,712,840.26
  5. Step 5: Solve for x
    x = 66,311,712,840.26/420,639.50
  6. Step 6: Final answer
    x = 157,645.00

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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.