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Finding the Fourth Proportional to 318,030, 438,618.50 and 215,887.56

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Solution

The fourth proportional to 318,030, 438,618.50 and 215,887.56 is: 297,746.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,030 : 438,618.50 = 215,887.56 : x
  2. Step 2: Convert to fraction form
    318,030/438,618.50 = 215,887.56/x
  3. Step 3: Cross multiply
    318,030x = 438,618.50 × 215,887.56
  4. Step 4: Simplify right side
    318,030x = 94,692,277,735.86
  5. Step 5: Solve for x
    x = 94,692,277,735.86/318,030
  6. Step 6: Final answer
    x = 297,746.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.