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Finding the Fourth Proportional to 1,307.23, 1,804.09 and 717.88

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Solution

The fourth proportional to 1,307.23, 1,804.09 and 717.88 is: 990.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.23 : 1,804.09 = 717.88 : x
  2. Step 2: Convert to fraction form
    1,307.23/1,804.09 = 717.88/x
  3. Step 3: Cross multiply
    1,307.23x = 1,804.09 × 717.88
  4. Step 4: Simplify right side
    1,307.23x = 1,295,120.13
  5. Step 5: Solve for x
    x = 1,295,120.13/1,307.23
  6. Step 6: Final answer
    x = 990.74

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1.5x scale

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.