Home / 388,819.50-536,570.91-209,971.50

Finding the Fourth Proportional to 388,819.50, 536,570.91 and 209,971.50

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Solution

The fourth proportional to 388,819.50, 536,570.91 and 209,971.50 is: 289,760.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,819.50 : 536,570.91 = 209,971.50 : x
  2. Step 2: Convert to fraction form
    388,819.50/536,570.91 = 209,971.50/x
  3. Step 3: Cross multiply
    388,819.50x = 536,570.91 × 209,971.50
  4. Step 4: Simplify right side
    388,819.50x = 112,664,598,829.07
  5. Step 5: Solve for x
    x = 112,664,598,829.07/388,819.50
  6. Step 6: Final answer
    x = 289,760.67

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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.