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Finding the Fourth Proportional to 318,771.83, 477,798.91 and 139,008.53

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Solution

The fourth proportional to 318,771.83, 477,798.91 and 139,008.53 is: 208,356.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,771.83 : 477,798.91 = 139,008.53 : x
  2. Step 2: Convert to fraction form
    318,771.83/477,798.91 = 139,008.53/x
  3. Step 3: Cross multiply
    318,771.83x = 477,798.91 × 139,008.53
  4. Step 4: Simplify right side
    318,771.83x = 66,418,124,114.70
  5. Step 5: Solve for x
    x = 66,418,124,114.70/318,771.83
  6. Step 6: Final answer
    x = 208,356.32

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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.