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Finding the Fourth Proportional to 613,556.55, 920,376.89 and 208,584

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Solution

The fourth proportional to 613,556.55, 920,376.89 and 208,584 is: 312,890.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,556.55 : 920,376.89 = 208,584 : x
  2. Step 2: Convert to fraction form
    613,556.55/920,376.89 = 208,584/x
  3. Step 3: Cross multiply
    613,556.55x = 920,376.89 × 208,584
  4. Step 4: Simplify right side
    613,556.55x = 191,975,892,180.84
  5. Step 5: Solve for x
    x = 191,975,892,180.84/613,556.55
  6. Step 6: Final answer
    x = 312,890.30

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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.