Home / 1,098.32-1,515.69-619.76

Finding the Fourth Proportional to 1,098.32, 1,515.69 and 619.76

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Solution

The fourth proportional to 1,098.32, 1,515.69 and 619.76 is: 855.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.32 : 1,515.69 = 619.76 : x
  2. Step 2: Convert to fraction form
    1,098.32/1,515.69 = 619.76/x
  3. Step 3: Cross multiply
    1,098.32x = 1,515.69 × 619.76
  4. Step 4: Simplify right side
    1,098.32x = 939,356.46
  5. Step 5: Solve for x
    x = 939,356.46/1,098.32
  6. Step 6: Final answer
    x = 855.27

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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.