Home / 1,239.09-1,857.56-508.16

Finding the Fourth Proportional to 1,239.09, 1,857.56 and 508.16

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Solution

The fourth proportional to 1,239.09, 1,857.56 and 508.16 is: 761.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.09 : 1,857.56 = 508.16 : x
  2. Step 2: Convert to fraction form
    1,239.09/1,857.56 = 508.16/x
  3. Step 3: Cross multiply
    1,239.09x = 1,857.56 × 508.16
  4. Step 4: Simplify right side
    1,239.09x = 943,925.86
  5. Step 5: Solve for x
    x = 943,925.86/1,239.09
  6. Step 6: Final answer
    x = 761.79

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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.