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Finding the Fourth Proportional to 943.79, 1,415.45 and 637.50

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Solution

The fourth proportional to 943.79, 1,415.45 and 637.50 is: 956.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.79 : 1,415.45 = 637.50 : x
  2. Step 2: Convert to fraction form
    943.79/1,415.45 = 637.50/x
  3. Step 3: Cross multiply
    943.79x = 1,415.45 × 637.50
  4. Step 4: Simplify right side
    943.79x = 902,346.19
  5. Step 5: Solve for x
    x = 902,346.19/943.79
  6. Step 6: Final answer
    x = 956.09

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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.