Home / 1,130.19-1,695.33-399.87

Finding the Fourth Proportional to 1,130.19, 1,695.33 and 399.87

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Solution

The fourth proportional to 1,130.19, 1,695.33 and 399.87 is: 599.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.19 : 1,695.33 = 399.87 : x
  2. Step 2: Convert to fraction form
    1,130.19/1,695.33 = 399.87/x
  3. Step 3: Cross multiply
    1,130.19x = 1,695.33 × 399.87
  4. Step 4: Simplify right side
    1,130.19x = 677,911.61
  5. Step 5: Solve for x
    x = 677,911.61/1,130.19
  6. Step 6: Final answer
    x = 599.82

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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.