Home / 1,127.08-1,690.20-397.24

Finding the Fourth Proportional to 1,127.08, 1,690.20 and 397.24

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Solution

The fourth proportional to 1,127.08, 1,690.20 and 397.24 is: 595.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.08 : 1,690.20 = 397.24 : x
  2. Step 2: Convert to fraction form
    1,127.08/1,690.20 = 397.24/x
  3. Step 3: Cross multiply
    1,127.08x = 1,690.20 × 397.24
  4. Step 4: Simplify right side
    1,127.08x = 671,415.05
  5. Step 5: Solve for x
    x = 671,415.05/1,127.08
  6. Step 6: Final answer
    x = 595.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.