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Finding the Fourth Proportional to 1,420.58, 2,130.88 and 496.14

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Solution

The fourth proportional to 1,420.58, 2,130.88 and 496.14 is: 744.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.58 : 2,130.88 = 496.14 : x
  2. Step 2: Convert to fraction form
    1,420.58/2,130.88 = 496.14/x
  3. Step 3: Cross multiply
    1,420.58x = 2,130.88 × 496.14
  4. Step 4: Simplify right side
    1,420.58x = 1,057,214.80
  5. Step 5: Solve for x
    x = 1,057,214.80/1,420.58
  6. Step 6: Final answer
    x = 744.21

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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.