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Finding the Fourth Proportional to 998.07, 1,498.06 and 478.36

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Solution

The fourth proportional to 998.07, 1,498.06 and 478.36 is: 718.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.07 : 1,498.06 = 478.36 : x
  2. Step 2: Convert to fraction form
    998.07/1,498.06 = 478.36/x
  3. Step 3: Cross multiply
    998.07x = 1,498.06 × 478.36
  4. Step 4: Simplify right side
    998.07x = 716,611.98
  5. Step 5: Solve for x
    x = 716,611.98/998.07
  6. Step 6: Final answer
    x = 718.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.