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Finding the Fourth Proportional to 1,307.50, 1,804.51 and 755.50

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Solution

The fourth proportional to 1,307.50, 1,804.51 and 755.50 is: 1,042.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.50 : 1,804.51 = 755.50 : x
  2. Step 2: Convert to fraction form
    1,307.50/1,804.51 = 755.50/x
  3. Step 3: Cross multiply
    1,307.50x = 1,804.51 × 755.50
  4. Step 4: Simplify right side
    1,307.50x = 1,363,307.31
  5. Step 5: Solve for x
    x = 1,363,307.31/1,307.50
  6. Step 6: Final answer
    x = 1,042.68

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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.