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Finding the Fourth Proportional to 988.15, 1,482.29 and 339.34

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Solution

The fourth proportional to 988.15, 1,482.29 and 339.34 is: 509.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.15 : 1,482.29 = 339.34 : x
  2. Step 2: Convert to fraction form
    988.15/1,482.29 = 339.34/x
  3. Step 3: Cross multiply
    988.15x = 1,482.29 × 339.34
  4. Step 4: Simplify right side
    988.15x = 503,000.29
  5. Step 5: Solve for x
    x = 503,000.29/988.15
  6. Step 6: Final answer
    x = 509.03

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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.