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Finding the Fourth Proportional to 993.01, 1,488.66 and 437.30

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Solution

The fourth proportional to 993.01, 1,488.66 and 437.30 is: 655.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.01 : 1,488.66 = 437.30 : x
  2. Step 2: Convert to fraction form
    993.01/1,488.66 = 437.30/x
  3. Step 3: Cross multiply
    993.01x = 1,488.66 × 437.30
  4. Step 4: Simplify right side
    993.01x = 650,984.67
  5. Step 5: Solve for x
    x = 650,984.67/993.01
  6. Step 6: Final answer
    x = 655.57

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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.