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Finding the Fourth Proportional to 978, 1,467.64 and 370

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Solution

The fourth proportional to 978, 1,467.64 and 370 is: 555.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    978 : 1,467.64 = 370 : x
  2. Step 2: Convert to fraction form
    978/1,467.64 = 370/x
  3. Step 3: Cross multiply
    978x = 1,467.64 × 370
  4. Step 4: Simplify right side
    978x = 543,026.80
  5. Step 5: Solve for x
    x = 543,026.80/978
  6. Step 6: Final answer
    x = 555.24

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