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Finding the Fourth Proportional to 1,988.98, 2,983.48 and 528.02

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Solution

The fourth proportional to 1,988.98, 2,983.48 and 528.02 is: 792.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.98 : 2,983.48 = 528.02 : x
  2. Step 2: Convert to fraction form
    1,988.98/2,983.48 = 528.02/x
  3. Step 3: Cross multiply
    1,988.98x = 2,983.48 × 528.02
  4. Step 4: Simplify right side
    1,988.98x = 1,575,337.11
  5. Step 5: Solve for x
    x = 1,575,337.11/1,988.98
  6. Step 6: Final answer
    x = 792.03

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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.