Home / 1,577.12-2,176.50-913.92

Finding the Fourth Proportional to 1,577.12, 2,176.50 and 913.92

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Solution

The fourth proportional to 1,577.12, 2,176.50 and 913.92 is: 1,261.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,577.12 : 2,176.50 = 913.92 : x
  2. Step 2: Convert to fraction form
    1,577.12/2,176.50 = 913.92/x
  3. Step 3: Cross multiply
    1,577.12x = 2,176.50 × 913.92
  4. Step 4: Simplify right side
    1,577.12x = 1,989,146.88
  5. Step 5: Solve for x
    x = 1,989,146.88/1,577.12
  6. Step 6: Final answer
    x = 1,261.25

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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.