Home / 1,623.37-2,240.09-915.20

Finding the Fourth Proportional to 1,623.37, 2,240.09 and 915.20

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Solution

The fourth proportional to 1,623.37, 2,240.09 and 915.20 is: 1,262.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,623.37 : 2,240.09 = 915.20 : x
  2. Step 2: Convert to fraction form
    1,623.37/2,240.09 = 915.20/x
  3. Step 3: Cross multiply
    1,623.37x = 2,240.09 × 915.20
  4. Step 4: Simplify right side
    1,623.37x = 2,050,130.37
  5. Step 5: Solve for x
    x = 2,050,130.37/1,623.37
  6. Step 6: Final answer
    x = 1,262.89

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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.