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Finding the Fourth Proportional to 1,663.41, 2,295.45 and 917.28

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Solution

The fourth proportional to 1,663.41, 2,295.45 and 917.28 is: 1,265.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,663.41 : 2,295.45 = 917.28 : x
  2. Step 2: Convert to fraction form
    1,663.41/2,295.45 = 917.28/x
  3. Step 3: Cross multiply
    1,663.41x = 2,295.45 × 917.28
  4. Step 4: Simplify right side
    1,663.41x = 2,105,570.38
  5. Step 5: Solve for x
    x = 2,105,570.38/1,663.41
  6. Step 6: Final answer
    x = 1,265.82

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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.