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Finding the Fourth Proportional to 388,970.56, 536,778.57 and 210,122.56

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Solution

The fourth proportional to 388,970.56, 536,778.57 and 210,122.56 is: 289,968.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,970.56 : 536,778.57 = 210,122.56 : x
  2. Step 2: Convert to fraction form
    388,970.56/536,778.57 = 210,122.56/x
  3. Step 3: Cross multiply
    388,970.56x = 536,778.57 × 210,122.56
  4. Step 4: Simplify right side
    388,970.56x = 112,789,287,281.54
  5. Step 5: Solve for x
    x = 112,789,287,281.54/388,970.56
  6. Step 6: Final answer
    x = 289,968.70

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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.