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Finding the Fourth Proportional to 489,045, 674,883.96 and 285,236.67

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Solution

The fourth proportional to 489,045, 674,883.96 and 285,236.67 is: 393,627.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,045 : 674,883.96 = 285,236.67 : x
  2. Step 2: Convert to fraction form
    489,045/674,883.96 = 285,236.67/x
  3. Step 3: Cross multiply
    489,045x = 674,883.96 × 285,236.67
  4. Step 4: Simplify right side
    489,045x = 192,501,653,386.81
  5. Step 5: Solve for x
    x = 192,501,653,386.81/489,045
  6. Step 6: Final answer
    x = 393,627.69

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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.