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Finding the Fourth Proportional to 388,896.66, 583,363.44 and 188,978.90

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Solution

The fourth proportional to 388,896.66, 583,363.44 and 188,978.90 is: 283,477.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,896.66 : 583,363.44 = 188,978.90 : x
  2. Step 2: Convert to fraction form
    388,896.66/583,363.44 = 188,978.90/x
  3. Step 3: Cross multiply
    388,896.66x = 583,363.44 × 188,978.90
  4. Step 4: Simplify right side
    388,896.66x = 110,243,381,191.42
  5. Step 5: Solve for x
    x = 110,243,381,191.42/388,896.66
  6. Step 6: Final answer
    x = 283,477.32

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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.