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Finding the Fourth Proportional to 628,056.68, 941,728.25 and 428,618.67

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Solution

The fourth proportional to 628,056.68, 941,728.25 and 428,618.67 is: 642,684.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,056.68 : 941,728.25 = 428,618.67 : x
  2. Step 2: Convert to fraction form
    628,056.68/941,728.25 = 428,618.67/x
  3. Step 3: Cross multiply
    628,056.68x = 941,728.25 × 428,618.67
  4. Step 4: Simplify right side
    628,056.68x = 403,642,307,873.33
  5. Step 5: Solve for x
    x = 403,642,307,873.33/628,056.68
  6. Step 6: Final answer
    x = 642,684.53

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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.