Home / 1,420.18-2,130.57-446.36

Finding the Fourth Proportional to 1,420.18, 2,130.57 and 446.36

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Solution

The fourth proportional to 1,420.18, 2,130.57 and 446.36 is: 669.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.18 : 2,130.57 = 446.36 : x
  2. Step 2: Convert to fraction form
    1,420.18/2,130.57 = 446.36/x
  3. Step 3: Cross multiply
    1,420.18x = 2,130.57 × 446.36
  4. Step 4: Simplify right side
    1,420.18x = 951,001.23
  5. Step 5: Solve for x
    x = 951,001.23/1,420.18
  6. Step 6: Final answer
    x = 669.63

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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.