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Finding the Fourth Proportional to 993.41, 1,490.15 and 368.87

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Solution

The fourth proportional to 993.41, 1,490.15 and 368.87 is: 553.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.41 : 1,490.15 = 368.87 : x
  2. Step 2: Convert to fraction form
    993.41/1,490.15 = 368.87/x
  3. Step 3: Cross multiply
    993.41x = 1,490.15 × 368.87
  4. Step 4: Simplify right side
    993.41x = 549,676.28
  5. Step 5: Solve for x
    x = 549,676.28/993.41
  6. Step 6: Final answer
    x = 553.32

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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.