Home / 1,117.17-1,541.67-619.81

Finding the Fourth Proportional to 1,117.17, 1,541.67 and 619.81

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Solution

The fourth proportional to 1,117.17, 1,541.67 and 619.81 is: 855.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.17 : 1,541.67 = 619.81 : x
  2. Step 2: Convert to fraction form
    1,117.17/1,541.67 = 619.81/x
  3. Step 3: Cross multiply
    1,117.17x = 1,541.67 × 619.81
  4. Step 4: Simplify right side
    1,117.17x = 955,531.68
  5. Step 5: Solve for x
    x = 955,531.68/1,117.17
  6. Step 6: Final answer
    x = 855.31

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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.