Home / 1,661.19-2,292.46-915.14

Finding the Fourth Proportional to 1,661.19, 2,292.46 and 915.14

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Solution

The fourth proportional to 1,661.19, 2,292.46 and 915.14 is: 1,262.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.19 : 2,292.46 = 915.14 : x
  2. Step 2: Convert to fraction form
    1,661.19/2,292.46 = 915.14/x
  3. Step 3: Cross multiply
    1,661.19x = 2,292.46 × 915.14
  4. Step 4: Simplify right side
    1,661.19x = 2,097,925.29
  5. Step 5: Solve for x
    x = 2,097,925.29/1,661.19
  6. Step 6: Final answer
    x = 1,262.91

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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.