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Finding the Fourth Proportional to 1,130.47, 1,694.57 and 399.57

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Solution

The fourth proportional to 1,130.47, 1,694.57 and 399.57 is: 598.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.47 : 1,694.57 = 399.57 : x
  2. Step 2: Convert to fraction form
    1,130.47/1,694.57 = 399.57/x
  3. Step 3: Cross multiply
    1,130.47x = 1,694.57 × 399.57
  4. Step 4: Simplify right side
    1,130.47x = 677,090.98
  5. Step 5: Solve for x
    x = 677,090.98/1,130.47
  6. Step 6: Final answer
    x = 598.95

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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.