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Finding the Fourth Proportional to 492,439.60, 738,683.70 and 256,243.60

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Solution

The fourth proportional to 492,439.60, 738,683.70 and 256,243.60 is: 384,378.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,439.60 : 738,683.70 = 256,243.60 : x
  2. Step 2: Convert to fraction form
    492,439.60/738,683.70 = 256,243.60/x
  3. Step 3: Cross multiply
    492,439.60x = 738,683.70 × 256,243.60
  4. Step 4: Simplify right side
    492,439.60x = 189,282,970,549.32
  5. Step 5: Solve for x
    x = 189,282,970,549.32/492,439.60
  6. Step 6: Final answer
    x = 384,378.04

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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.