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Finding the Fourth Proportional to 628,613.72, 867,486.95 and 342,135.89

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Solution

The fourth proportional to 628,613.72, 867,486.95 and 342,135.89 is: 472,147.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,613.72 : 867,486.95 = 342,135.89 : x
  2. Step 2: Convert to fraction form
    628,613.72/867,486.95 = 342,135.89/x
  3. Step 3: Cross multiply
    628,613.72x = 867,486.95 × 342,135.89
  4. Step 4: Simplify right side
    628,613.72x = 296,798,419,701.64
  5. Step 5: Solve for x
    x = 296,798,419,701.64/628,613.72
  6. Step 6: Final answer
    x = 472,147.54

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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.