Home / 1,577.80-2,177.37-915.05

Finding the Fourth Proportional to 1,577.80, 2,177.37 and 915.05

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Solution

The fourth proportional to 1,577.80, 2,177.37 and 915.05 is: 1,262.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,577.80 : 2,177.37 = 915.05 : x
  2. Step 2: Convert to fraction form
    1,577.80/2,177.37 = 915.05/x
  3. Step 3: Cross multiply
    1,577.80x = 2,177.37 × 915.05
  4. Step 4: Simplify right side
    1,577.80x = 1,992,391.53
  5. Step 5: Solve for x
    x = 1,992,391.53/1,577.80
  6. Step 6: Final answer
    x = 1,262.77

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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.