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Finding the Fourth Proportional to 396,291.45, 594,482.28 and 143,690.91

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Solution

The fourth proportional to 396,291.45, 594,482.28 and 143,690.91 is: 215,552.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,291.45 : 594,482.28 = 143,690.91 : x
  2. Step 2: Convert to fraction form
    396,291.45/594,482.28 = 143,690.91/x
  3. Step 3: Cross multiply
    396,291.45x = 594,482.28 × 143,690.91
  4. Step 4: Simplify right side
    396,291.45x = 85,421,699,792.07
  5. Step 5: Solve for x
    x = 85,421,699,792.07/396,291.45
  6. Step 6: Final answer
    x = 215,552.72

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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.