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Finding the Fourth Proportional to 988.89, 1,482.80 and 475.89

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Solution

The fourth proportional to 988.89, 1,482.80 and 475.89 is: 713.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.89 : 1,482.80 = 475.89 : x
  2. Step 2: Convert to fraction form
    988.89/1,482.80 = 475.89/x
  3. Step 3: Cross multiply
    988.89x = 1,482.80 × 475.89
  4. Step 4: Simplify right side
    988.89x = 705,647.31
  5. Step 5: Solve for x
    x = 705,647.31/988.89
  6. Step 6: Final answer
    x = 713.58

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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.