Home / 491,442.05-678,399.30-330,390.53

Finding the Fourth Proportional to 491,442.05, 678,399.30 and 330,390.53

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Solution

The fourth proportional to 491,442.05, 678,399.30 and 330,390.53 is: 456,079.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,442.05 : 678,399.30 = 330,390.53 : x
  2. Step 2: Convert to fraction form
    491,442.05/678,399.30 = 330,390.53/x
  3. Step 3: Cross multiply
    491,442.05x = 678,399.30 × 330,390.53
  4. Step 4: Simplify right side
    491,442.05x = 224,136,703,430.63
  5. Step 5: Solve for x
    x = 224,136,703,430.63/491,442.05
  6. Step 6: Final answer
    x = 456,079.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.