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Finding the Fourth Proportional to 1,419.93, 2,130.03 and 542.43

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Solution

The fourth proportional to 1,419.93, 2,130.03 and 542.43 is: 813.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.93 : 2,130.03 = 542.43 : x
  2. Step 2: Convert to fraction form
    1,419.93/2,130.03 = 542.43/x
  3. Step 3: Cross multiply
    1,419.93x = 2,130.03 × 542.43
  4. Step 4: Simplify right side
    1,419.93x = 1,155,392.17
  5. Step 5: Solve for x
    x = 1,155,392.17/1,419.93
  6. Step 6: Final answer
    x = 813.70

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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.