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Finding the Fourth Proportional to 688.63, 950.55 and 412.63

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Solution

The fourth proportional to 688.63, 950.55 and 412.63 is: 569.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.63 : 950.55 = 412.63 : x
  2. Step 2: Convert to fraction form
    688.63/950.55 = 412.63/x
  3. Step 3: Cross multiply
    688.63x = 950.55 × 412.63
  4. Step 4: Simplify right side
    688.63x = 392,225.45
  5. Step 5: Solve for x
    x = 392,225.45/688.63
  6. Step 6: Final answer
    x = 569.57

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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.