Home / 1,663.40-2,295.48-917.35

Finding the Fourth Proportional to 1,663.40, 2,295.48 and 917.35

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Solution

The fourth proportional to 1,663.40, 2,295.48 and 917.35 is: 1,265.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,663.40 : 2,295.48 = 917.35 : x
  2. Step 2: Convert to fraction form
    1,663.40/2,295.48 = 917.35/x
  3. Step 3: Cross multiply
    1,663.40x = 2,295.48 × 917.35
  4. Step 4: Simplify right side
    1,663.40x = 2,105,747.10
  5. Step 5: Solve for x
    x = 2,105,747.10/1,663.40
  6. Step 6: Final answer
    x = 1,265.93

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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.