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Finding the Fourth Proportional to 1,004.66, 1,509.30 and 712.88

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Solution

The fourth proportional to 1,004.66, 1,509.30 and 712.88 is: 1,070.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.66 : 1,509.30 = 712.88 : x
  2. Step 2: Convert to fraction form
    1,004.66/1,509.30 = 712.88/x
  3. Step 3: Cross multiply
    1,004.66x = 1,509.30 × 712.88
  4. Step 4: Simplify right side
    1,004.66x = 1,075,949.78
  5. Step 5: Solve for x
    x = 1,075,949.78/1,004.66
  6. Step 6: Final answer
    x = 1,070.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.