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Finding the Fourth Proportional to 987.12, 1,482.03 and 554.58

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Solution

The fourth proportional to 987.12, 1,482.03 and 554.58 is: 832.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.12 : 1,482.03 = 554.58 : x
  2. Step 2: Convert to fraction form
    987.12/1,482.03 = 554.58/x
  3. Step 3: Cross multiply
    987.12x = 1,482.03 × 554.58
  4. Step 4: Simplify right side
    987.12x = 821,904.20
  5. Step 5: Solve for x
    x = 821,904.20/987.12
  6. Step 6: Final answer
    x = 832.63

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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.