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Finding the Fourth Proportional to 1,117.17, 1,541.48 and 619.70

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Solution

The fourth proportional to 1,117.17, 1,541.48 and 619.70 is: 855.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.17 : 1,541.48 = 619.70 : x
  2. Step 2: Convert to fraction form
    1,117.17/1,541.48 = 619.70/x
  3. Step 3: Cross multiply
    1,117.17x = 1,541.48 × 619.70
  4. Step 4: Simplify right side
    1,117.17x = 955,244.35
  5. Step 5: Solve for x
    x = 955,244.35/1,117.17
  6. Step 6: Final answer
    x = 855.06

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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.