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Finding the Fourth Proportional to 669.77, 1,000.09 and 591.02

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Solution

The fourth proportional to 669.77, 1,000.09 and 591.02 is: 882.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.77 : 1,000.09 = 591.02 : x
  2. Step 2: Convert to fraction form
    669.77/1,000.09 = 591.02/x
  3. Step 3: Cross multiply
    669.77x = 1,000.09 × 591.02
  4. Step 4: Simplify right side
    669.77x = 591,070.24
  5. Step 5: Solve for x
    x = 591,070.24/669.77
  6. Step 6: Final answer
    x = 882.50

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.