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Finding the Fourth Proportional to 5,874.40, 8,810.04 and 1,978

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Solution

The fourth proportional to 5,874.40, 8,810.04 and 1,978 is: 2,966.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,874.40 : 8,810.04 = 1,978 : x
  2. Step 2: Convert to fraction form
    5,874.40/8,810.04 = 1,978/x
  3. Step 3: Cross multiply
    5,874.40x = 8,810.04 × 1,978
  4. Step 4: Simplify right side
    5,874.40x = 17,426,259.12
  5. Step 5: Solve for x
    x = 17,426,259.12/5,874.40
  6. Step 6: Final answer
    x = 2,966.47

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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.