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Finding the Fourth Proportional to 388,889.90, 583,464.45 and 189,334.70

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Solution

The fourth proportional to 388,889.90, 583,464.45 and 189,334.70 is: 284,065.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,889.90 : 583,464.45 = 189,334.70 : x
  2. Step 2: Convert to fraction form
    388,889.90/583,464.45 = 189,334.70/x
  3. Step 3: Cross multiply
    388,889.90x = 583,464.45 × 189,334.70
  4. Step 4: Simplify right side
    388,889.90x = 110,470,066,601.42
  5. Step 5: Solve for x
    x = 110,470,066,601.42/388,889.90
  6. Step 6: Final answer
    x = 284,065.15

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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.