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Finding the Fourth Proportional to 388,830.60, 583,245.90 and 262,859.40

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Solution

The fourth proportional to 388,830.60, 583,245.90 and 262,859.40 is: 394,289.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,830.60 : 583,245.90 = 262,859.40 : x
  2. Step 2: Convert to fraction form
    388,830.60/583,245.90 = 262,859.40/x
  3. Step 3: Cross multiply
    388,830.60x = 583,245.90 × 262,859.40
  4. Step 4: Simplify right side
    388,830.60x = 153,311,667,326.46
  5. Step 5: Solve for x
    x = 153,311,667,326.46/388,830.60
  6. Step 6: Final answer
    x = 394,289.10

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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.