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Finding the Fourth Proportional to 937.50, 1,293.75 and 661.98

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Solution

The fourth proportional to 937.50, 1,293.75 and 661.98 is: 913.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.50 : 1,293.75 = 661.98 : x
  2. Step 2: Convert to fraction form
    937.50/1,293.75 = 661.98/x
  3. Step 3: Cross multiply
    937.50x = 1,293.75 × 661.98
  4. Step 4: Simplify right side
    937.50x = 856,436.63
  5. Step 5: Solve for x
    x = 856,436.63/937.50
  6. Step 6: Final answer
    x = 913.53

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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.