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Finding the Fourth Proportional to 761.90, 1,052.01 and 669.74

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Solution

The fourth proportional to 761.90, 1,052.01 and 669.74 is: 924.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.90 : 1,052.01 = 669.74 : x
  2. Step 2: Convert to fraction form
    761.90/1,052.01 = 669.74/x
  3. Step 3: Cross multiply
    761.90x = 1,052.01 × 669.74
  4. Step 4: Simplify right side
    761.90x = 704,569.83
  5. Step 5: Solve for x
    x = 704,569.83/761.90
  6. Step 6: Final answer
    x = 924.75

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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.