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Finding the Fourth Proportional to 995.39, 1,492.88 and 557.08

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Solution

The fourth proportional to 995.39, 1,492.88 and 557.08 is: 835.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.39 : 1,492.88 = 557.08 : x
  2. Step 2: Convert to fraction form
    995.39/1,492.88 = 557.08/x
  3. Step 3: Cross multiply
    995.39x = 1,492.88 × 557.08
  4. Step 4: Simplify right side
    995.39x = 831,650.21
  5. Step 5: Solve for x
    x = 831,650.21/995.39
  6. Step 6: Final answer
    x = 835.50

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1.5x scale

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.