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Finding the Fourth Proportional to 435.70, 611.60 and 435.70

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Solution

The fourth proportional to 435.70, 611.60 and 435.70 is: 611.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.70 : 611.60 = 435.70 : x
  2. Step 2: Convert to fraction form
    435.70/611.60 = 435.70/x
  3. Step 3: Cross multiply
    435.70x = 611.60 × 435.70
  4. Step 4: Simplify right side
    435.70x = 266,474.12
  5. Step 5: Solve for x
    x = 266,474.12/435.70
  6. Step 6: Final answer
    x = 611.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.