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Finding the Fourth Proportional to 483,936.40, 725,904.60 and 421,728.40

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Solution

The fourth proportional to 483,936.40, 725,904.60 and 421,728.40 is: 632,592.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,936.40 : 725,904.60 = 421,728.40 : x
  2. Step 2: Convert to fraction form
    483,936.40/725,904.60 = 421,728.40/x
  3. Step 3: Cross multiply
    483,936.40x = 725,904.60 × 421,728.40
  4. Step 4: Simplify right side
    483,936.40x = 306,134,585,510.64
  5. Step 5: Solve for x
    x = 306,134,585,510.64/483,936.40
  6. Step 6: Final answer
    x = 632,592.60

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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.