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Finding the Fourth Proportional to 1,419.88, 2,130.06 and 554.24

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Solution

The fourth proportional to 1,419.88, 2,130.06 and 554.24 is: 831.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.88 : 2,130.06 = 554.24 : x
  2. Step 2: Convert to fraction form
    1,419.88/2,130.06 = 554.24/x
  3. Step 3: Cross multiply
    1,419.88x = 2,130.06 × 554.24
  4. Step 4: Simplify right side
    1,419.88x = 1,180,564.45
  5. Step 5: Solve for x
    x = 1,180,564.45/1,419.88
  6. Step 6: Final answer
    x = 831.45

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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.