Home / 1,430.67-2,145.13-699.51

Finding the Fourth Proportional to 1,430.67, 2,145.13 and 699.51

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Solution

The fourth proportional to 1,430.67, 2,145.13 and 699.51 is: 1,048.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.67 : 2,145.13 = 699.51 : x
  2. Step 2: Convert to fraction form
    1,430.67/2,145.13 = 699.51/x
  3. Step 3: Cross multiply
    1,430.67x = 2,145.13 × 699.51
  4. Step 4: Simplify right side
    1,430.67x = 1,500,539.89
  5. Step 5: Solve for x
    x = 1,500,539.89/1,430.67
  6. Step 6: Final answer
    x = 1,048.84

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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.