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Finding the Fourth Proportional to 318,783.60, 477,138.60 and 248,281.20

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Solution

The fourth proportional to 318,783.60, 477,138.60 and 248,281.20 is: 371,614.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,783.60 : 477,138.60 = 248,281.20 : x
  2. Step 2: Convert to fraction form
    318,783.60/477,138.60 = 248,281.20/x
  3. Step 3: Cross multiply
    318,783.60x = 477,138.60 × 248,281.20
  4. Step 4: Simplify right side
    318,783.60x = 118,464,544,174.32
  5. Step 5: Solve for x
    x = 118,464,544,174.32/318,783.60
  6. Step 6: Final answer
    x = 371,614.30

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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.