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Finding the Fourth Proportional to 995.15, 1,492.76 and 378.77

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Solution

The fourth proportional to 995.15, 1,492.76 and 378.77 is: 568.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.15 : 1,492.76 = 378.77 : x
  2. Step 2: Convert to fraction form
    995.15/1,492.76 = 378.77/x
  3. Step 3: Cross multiply
    995.15x = 1,492.76 × 378.77
  4. Step 4: Simplify right side
    995.15x = 565,406.19
  5. Step 5: Solve for x
    x = 565,406.19/995.15
  6. Step 6: Final answer
    x = 568.16

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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.