Home / 318,918.03-478,377.70-299,431.86

Finding the Fourth Proportional to 318,918.03, 478,377.70 and 299,431.86

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Solution

The fourth proportional to 318,918.03, 478,377.70 and 299,431.86 is: 449,148.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,918.03 : 478,377.70 = 299,431.86 : x
  2. Step 2: Convert to fraction form
    318,918.03/478,377.70 = 299,431.86/x
  3. Step 3: Cross multiply
    318,918.03x = 478,377.70 × 299,431.86
  4. Step 4: Simplify right side
    318,918.03x = 143,241,521,951.03
  5. Step 5: Solve for x
    x = 143,241,521,951.03/318,918.03
  6. Step 6: Final answer
    x = 449,148.40

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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.