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Finding the Fourth Proportional to 1,663.44, 2,295.45 and 917.25

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Solution

The fourth proportional to 1,663.44, 2,295.45 and 917.25 is: 1,265.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,663.44 : 2,295.45 = 917.25 : x
  2. Step 2: Convert to fraction form
    1,663.44/2,295.45 = 917.25/x
  3. Step 3: Cross multiply
    1,663.44x = 2,295.45 × 917.25
  4. Step 4: Simplify right side
    1,663.44x = 2,105,501.51
  5. Step 5: Solve for x
    x = 2,105,501.51/1,663.44
  6. Step 6: Final answer
    x = 1,265.75

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1.5x scale

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.