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Finding the Fourth Proportional to 1,488.40, 2,055.72 and 1,402

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Solution

The fourth proportional to 1,488.40, 2,055.72 and 1,402 is: 1,936.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.40 : 2,055.72 = 1,402 : x
  2. Step 2: Convert to fraction form
    1,488.40/2,055.72 = 1,402/x
  3. Step 3: Cross multiply
    1,488.40x = 2,055.72 × 1,402
  4. Step 4: Simplify right side
    1,488.40x = 2,882,119.44
  5. Step 5: Solve for x
    x = 2,882,119.44/1,488.40
  6. Step 6: Final answer
    x = 1,936.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.