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Finding the Fourth Proportional to 486,994.56, 672,480 and 306,020.16

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Solution

The fourth proportional to 486,994.56, 672,480 and 306,020.16 is: 422,576.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,994.56 : 672,480 = 306,020.16 : x
  2. Step 2: Convert to fraction form
    486,994.56/672,480 = 306,020.16/x
  3. Step 3: Cross multiply
    486,994.56x = 672,480 × 306,020.16
  4. Step 4: Simplify right side
    486,994.56x = 205,792,437,196.80
  5. Step 5: Solve for x
    x = 205,792,437,196.80/486,994.56
  6. Step 6: Final answer
    x = 422,576.46

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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.