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Finding the Fourth Proportional to 474,806.18, 655,230.38 and 257,015

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Solution

The fourth proportional to 474,806.18, 655,230.38 and 257,015 is: 354,679.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    474,806.18 : 655,230.38 = 257,015 : x
  2. Step 2: Convert to fraction form
    474,806.18/655,230.38 = 257,015/x
  3. Step 3: Cross multiply
    474,806.18x = 655,230.38 × 257,015
  4. Step 4: Simplify right side
    474,806.18x = 168,404,036,115.70
  5. Step 5: Solve for x
    x = 168,404,036,115.70/474,806.18
  6. Step 6: Final answer
    x = 354,679.54

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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.