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Finding the Fourth Proportional to 557,522.19, 769,318.91 and 309,157.89

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Solution

The fourth proportional to 557,522.19, 769,318.91 and 309,157.89 is: 426,603.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,522.19 : 769,318.91 = 309,157.89 : x
  2. Step 2: Convert to fraction form
    557,522.19/769,318.91 = 309,157.89/x
  3. Step 3: Cross multiply
    557,522.19x = 769,318.91 × 309,157.89
  4. Step 4: Simplify right side
    557,522.19x = 237,841,010,952.70
  5. Step 5: Solve for x
    x = 237,841,010,952.70/557,522.19
  6. Step 6: Final answer
    x = 426,603.67

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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.