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Finding the Fourth Proportional to 993.48, 1,488.63 and 838.68

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Solution

The fourth proportional to 993.48, 1,488.63 and 838.68 is: 1,256.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.48 : 1,488.63 = 838.68 : x
  2. Step 2: Convert to fraction form
    993.48/1,488.63 = 838.68/x
  3. Step 3: Cross multiply
    993.48x = 1,488.63 × 838.68
  4. Step 4: Simplify right side
    993.48x = 1,248,484.21
  5. Step 5: Solve for x
    x = 1,248,484.21/993.48
  6. Step 6: Final answer
    x = 1,256.68

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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.