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Finding the Fourth Proportional to 1,656.28, 2,484.37 and 778.47

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Solution

The fourth proportional to 1,656.28, 2,484.37 and 778.47 is: 1,167.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,656.28 : 2,484.37 = 778.47 : x
  2. Step 2: Convert to fraction form
    1,656.28/2,484.37 = 778.47/x
  3. Step 3: Cross multiply
    1,656.28x = 2,484.37 × 778.47
  4. Step 4: Simplify right side
    1,656.28x = 1,933,999.17
  5. Step 5: Solve for x
    x = 1,933,999.17/1,656.28
  6. Step 6: Final answer
    x = 1,167.68

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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.