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Finding the Fourth Proportional to 318,543.36, 477,778.08 and 118,870.72

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Solution

The fourth proportional to 318,543.36, 477,778.08 and 118,870.72 is: 178,292.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,543.36 : 477,778.08 = 118,870.72 : x
  2. Step 2: Convert to fraction form
    318,543.36/477,778.08 = 118,870.72/x
  3. Step 3: Cross multiply
    318,543.36x = 477,778.08 × 118,870.72
  4. Step 4: Simplify right side
    318,543.36x = 56,793,824,369.82
  5. Step 5: Solve for x
    x = 56,793,824,369.82/318,543.36
  6. Step 6: Final answer
    x = 178,292.29

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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.