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Finding the Fourth Proportional to 318,544.36, 477,779.58 and 118,871.72

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Solution

The fourth proportional to 318,544.36, 477,779.58 and 118,871.72 is: 178,293.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,544.36 : 477,779.58 = 118,871.72 : x
  2. Step 2: Convert to fraction form
    318,544.36/477,779.58 = 118,871.72/x
  3. Step 3: Cross multiply
    318,544.36x = 477,779.58 × 118,871.72
  4. Step 4: Simplify right side
    318,544.36x = 56,794,480,455.48
  5. Step 5: Solve for x
    x = 56,794,480,455.48/318,544.36
  6. Step 6: Final answer
    x = 178,293.79

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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.