Home / 1,420.05-2,130.30-717.93

Finding the Fourth Proportional to 1,420.05, 2,130.30 and 717.93

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Solution

The fourth proportional to 1,420.05, 2,130.30 and 717.93 is: 1,077.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.05 : 2,130.30 = 717.93 : x
  2. Step 2: Convert to fraction form
    1,420.05/2,130.30 = 717.93/x
  3. Step 3: Cross multiply
    1,420.05x = 2,130.30 × 717.93
  4. Step 4: Simplify right side
    1,420.05x = 1,529,406.28
  5. Step 5: Solve for x
    x = 1,529,406.28/1,420.05
  6. Step 6: Final answer
    x = 1,077.01

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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.