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Finding the Fourth Proportional to 715.12, 986.68 and 435.30

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Solution

The fourth proportional to 715.12, 986.68 and 435.30 is: 600.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.12 : 986.68 = 435.30 : x
  2. Step 2: Convert to fraction form
    715.12/986.68 = 435.30/x
  3. Step 3: Cross multiply
    715.12x = 986.68 × 435.30
  4. Step 4: Simplify right side
    715.12x = 429,501.80
  5. Step 5: Solve for x
    x = 429,501.80/715.12
  6. Step 6: Final answer
    x = 600.60

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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.