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Finding the Fourth Proportional to 2,900.61, 4,002.90 and 1,765.89

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Solution

The fourth proportional to 2,900.61, 4,002.90 and 1,765.89 is: 2,436.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,900.61 : 4,002.90 = 1,765.89 : x
  2. Step 2: Convert to fraction form
    2,900.61/4,002.90 = 1,765.89/x
  3. Step 3: Cross multiply
    2,900.61x = 4,002.90 × 1,765.89
  4. Step 4: Simplify right side
    2,900.61x = 7,068,681.08
  5. Step 5: Solve for x
    x = 7,068,681.08/2,900.61
  6. Step 6: Final answer
    x = 2,436.96

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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.