Home / 1,140.17-1,710.51-399.89

Finding the Fourth Proportional to 1,140.17, 1,710.51 and 399.89

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Solution

The fourth proportional to 1,140.17, 1,710.51 and 399.89 is: 599.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.17 : 1,710.51 = 399.89 : x
  2. Step 2: Convert to fraction form
    1,140.17/1,710.51 = 399.89/x
  3. Step 3: Cross multiply
    1,140.17x = 1,710.51 × 399.89
  4. Step 4: Simplify right side
    1,140.17x = 684,015.84
  5. Step 5: Solve for x
    x = 684,015.84/1,140.17
  6. Step 6: Final answer
    x = 599.92

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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.