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Finding the Fourth Proportional to 492,419.60, 738,629.40 and 256,223.60

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Solution

The fourth proportional to 492,419.60, 738,629.40 and 256,223.60 is: 384,335.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,419.60 : 738,629.40 = 256,223.60 : x
  2. Step 2: Convert to fraction form
    492,419.60/738,629.40 = 256,223.60/x
  3. Step 3: Cross multiply
    492,419.60x = 738,629.40 × 256,223.60
  4. Step 4: Simplify right side
    492,419.60x = 189,254,283,933.84
  5. Step 5: Solve for x
    x = 189,254,283,933.84/492,419.60
  6. Step 6: Final answer
    x = 384,335.40

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Similar ratio
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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.