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Finding the Fourth Proportional to 700.50, 1,050.78 and 187.50

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Solution

The fourth proportional to 700.50, 1,050.78 and 187.50 is: 281.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.50 : 1,050.78 = 187.50 : x
  2. Step 2: Convert to fraction form
    700.50/1,050.78 = 187.50/x
  3. Step 3: Cross multiply
    700.50x = 1,050.78 × 187.50
  4. Step 4: Simplify right side
    700.50x = 197,021.25
  5. Step 5: Solve for x
    x = 197,021.25/700.50
  6. Step 6: Final answer
    x = 281.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.