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Finding the Fourth Proportional to 1,620.55, 2,430.86 and 525.03

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Solution

The fourth proportional to 1,620.55, 2,430.86 and 525.03 is: 787.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.55 : 2,430.86 = 525.03 : x
  2. Step 2: Convert to fraction form
    1,620.55/2,430.86 = 525.03/x
  3. Step 3: Cross multiply
    1,620.55x = 2,430.86 × 525.03
  4. Step 4: Simplify right side
    1,620.55x = 1,276,274.43
  5. Step 5: Solve for x
    x = 1,276,274.43/1,620.55
  6. Step 6: Final answer
    x = 787.56

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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.