Home / 1,125.12-1,686.16-508.06

Finding the Fourth Proportional to 1,125.12, 1,686.16 and 508.06

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Solution

The fourth proportional to 1,125.12, 1,686.16 and 508.06 is: 761.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.12 : 1,686.16 = 508.06 : x
  2. Step 2: Convert to fraction form
    1,125.12/1,686.16 = 508.06/x
  3. Step 3: Cross multiply
    1,125.12x = 1,686.16 × 508.06
  4. Step 4: Simplify right side
    1,125.12x = 856,659.48
  5. Step 5: Solve for x
    x = 856,659.48/1,125.12
  6. Step 6: Final answer
    x = 761.39

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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.