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Finding the Fourth Proportional to 1,607.60, 2,411.51 and 620.89

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Solution

The fourth proportional to 1,607.60, 2,411.51 and 620.89 is: 931.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,607.60 : 2,411.51 = 620.89 : x
  2. Step 2: Convert to fraction form
    1,607.60/2,411.51 = 620.89/x
  3. Step 3: Cross multiply
    1,607.60x = 2,411.51 × 620.89
  4. Step 4: Simplify right side
    1,607.60x = 1,497,273.31
  5. Step 5: Solve for x
    x = 1,497,273.31/1,607.60
  6. Step 6: Final answer
    x = 931.37

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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.