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Finding the Fourth Proportional to 715.15, 986.83 and 435.37

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Solution

The fourth proportional to 715.15, 986.83 and 435.37 is: 600.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.15 : 986.83 = 435.37 : x
  2. Step 2: Convert to fraction form
    715.15/986.83 = 435.37/x
  3. Step 3: Cross multiply
    715.15x = 986.83 × 435.37
  4. Step 4: Simplify right side
    715.15x = 429,636.18
  5. Step 5: Solve for x
    x = 429,636.18/715.15
  6. Step 6: Final answer
    x = 600.76

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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.