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Finding the Fourth Proportional to 1,036.73, 1,430.80 and 617.19

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Solution

The fourth proportional to 1,036.73, 1,430.80 and 617.19 is: 851.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.73 : 1,430.80 = 617.19 : x
  2. Step 2: Convert to fraction form
    1,036.73/1,430.80 = 617.19/x
  3. Step 3: Cross multiply
    1,036.73x = 1,430.80 × 617.19
  4. Step 4: Simplify right side
    1,036.73x = 883,068.54
  5. Step 5: Solve for x
    x = 883,068.54/1,036.73
  6. Step 6: Final answer
    x = 851.78

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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.