Home / 628,157.58-941,878.35-428,719.38

Finding the Fourth Proportional to 628,157.58, 941,878.35 and 428,719.38

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Solution

The fourth proportional to 628,157.58, 941,878.35 and 428,719.38 is: 642,834.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,157.58 : 941,878.35 = 428,719.38 : x
  2. Step 2: Convert to fraction form
    628,157.58/941,878.35 = 428,719.38/x
  3. Step 3: Cross multiply
    628,157.58x = 941,878.35 × 428,719.38
  4. Step 4: Simplify right side
    628,157.58x = 403,801,502,247.42
  5. Step 5: Solve for x
    x = 403,801,502,247.42/628,157.58
  6. Step 6: Final answer
    x = 642,834.72

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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.