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Finding the Fourth Proportional to 318,931.63, 478,331.73 and 141,325.36

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Solution

The fourth proportional to 318,931.63, 478,331.73 and 141,325.36 is: 211,958.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,931.63 : 478,331.73 = 141,325.36 : x
  2. Step 2: Convert to fraction form
    318,931.63/478,331.73 = 141,325.36/x
  3. Step 3: Cross multiply
    318,931.63x = 478,331.73 × 141,325.36
  4. Step 4: Simplify right side
    318,931.63x = 67,600,402,745.84
  5. Step 5: Solve for x
    x = 67,600,402,745.84/318,931.63
  6. Step 6: Final answer
    x = 211,958.92

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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.