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Finding the Fourth Proportional to 1,392.01, 2,087.31 and 525.71

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Solution

The fourth proportional to 1,392.01, 2,087.31 and 525.71 is: 788.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.01 : 2,087.31 = 525.71 : x
  2. Step 2: Convert to fraction form
    1,392.01/2,087.31 = 525.71/x
  3. Step 3: Cross multiply
    1,392.01x = 2,087.31 × 525.71
  4. Step 4: Simplify right side
    1,392.01x = 1,097,319.74
  5. Step 5: Solve for x
    x = 1,097,319.74/1,392.01
  6. Step 6: Final answer
    x = 788.30

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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.