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Finding the Fourth Proportional to 995.10, 1,490.28 and 555.67

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Solution

The fourth proportional to 995.10, 1,490.28 and 555.67 is: 832.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.10 : 1,490.28 = 555.67 : x
  2. Step 2: Convert to fraction form
    995.10/1,490.28 = 555.67/x
  3. Step 3: Cross multiply
    995.10x = 1,490.28 × 555.67
  4. Step 4: Simplify right side
    995.10x = 828,103.89
  5. Step 5: Solve for x
    x = 828,103.89/995.10
  6. Step 6: Final answer
    x = 832.18

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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.