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Finding the Fourth Proportional to 715.15, 986.92 and 435.39

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Solution

The fourth proportional to 715.15, 986.92 and 435.39 is: 600.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.15 : 986.92 = 435.39 : x
  2. Step 2: Convert to fraction form
    715.15/986.92 = 435.39/x
  3. Step 3: Cross multiply
    715.15x = 986.92 × 435.39
  4. Step 4: Simplify right side
    715.15x = 429,695.10
  5. Step 5: Solve for x
    x = 429,695.10/715.15
  6. Step 6: Final answer
    x = 600.85

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Double scale
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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.