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Finding the Fourth Proportional to 1,663.88, 2,495.86 and 509.63

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Solution

The fourth proportional to 1,663.88, 2,495.86 and 509.63 is: 764.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,663.88 : 2,495.86 = 509.63 : x
  2. Step 2: Convert to fraction form
    1,663.88/2,495.86 = 509.63/x
  3. Step 3: Cross multiply
    1,663.88x = 2,495.86 × 509.63
  4. Step 4: Simplify right side
    1,663.88x = 1,271,951.38
  5. Step 5: Solve for x
    x = 1,271,951.38/1,663.88
  6. Step 6: Final answer
    x = 764.45

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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.