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Finding the Fourth Proportional to 722.30, 995.30 and 498.30

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Solution

The fourth proportional to 722.30, 995.30 and 498.30 is: 686.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.30 : 995.30 = 498.30 : x
  2. Step 2: Convert to fraction form
    722.30/995.30 = 498.30/x
  3. Step 3: Cross multiply
    722.30x = 995.30 × 498.30
  4. Step 4: Simplify right side
    722.30x = 495,955.50
  5. Step 5: Solve for x
    x = 495,955.50/722.30
  6. Step 6: Final answer
    x = 686.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.