Home / 1,117.20-1,541.71-619.83

Finding the Fourth Proportional to 1,117.20, 1,541.71 and 619.83

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Solution

The fourth proportional to 1,117.20, 1,541.71 and 619.83 is: 855.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.20 : 1,541.71 = 619.83 : x
  2. Step 2: Convert to fraction form
    1,117.20/1,541.71 = 619.83/x
  3. Step 3: Cross multiply
    1,117.20x = 1,541.71 × 619.83
  4. Step 4: Simplify right side
    1,117.20x = 955,598.88
  5. Step 5: Solve for x
    x = 955,598.88/1,117.20
  6. Step 6: Final answer
    x = 855.35

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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.