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Finding the Fourth Proportional to 388,688.96, 536,393.76 and 218,907.20

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Solution

The fourth proportional to 388,688.96, 536,393.76 and 218,907.20 is: 302,093.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,688.96 : 536,393.76 = 218,907.20 : x
  2. Step 2: Convert to fraction form
    388,688.96/536,393.76 = 218,907.20/x
  3. Step 3: Cross multiply
    388,688.96x = 536,393.76 × 218,907.20
  4. Step 4: Simplify right side
    388,688.96x = 117,420,456,099.07
  5. Step 5: Solve for x
    x = 117,420,456,099.07/388,688.96
  6. Step 6: Final answer
    x = 302,093.62

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1.5x scale

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.