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Finding the Fourth Proportional to 761.62, 1,050.30 and 553.18

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Solution

The fourth proportional to 761.62, 1,050.30 and 553.18 is: 762.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.62 : 1,050.30 = 553.18 : x
  2. Step 2: Convert to fraction form
    761.62/1,050.30 = 553.18/x
  3. Step 3: Cross multiply
    761.62x = 1,050.30 × 553.18
  4. Step 4: Simplify right side
    761.62x = 581,004.95
  5. Step 5: Solve for x
    x = 581,004.95/761.62
  6. Step 6: Final answer
    x = 762.85

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1.5x scale

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.