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Finding the Fourth Proportional to 818.04, 1,129.06 and 690.92

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Solution

The fourth proportional to 818.04, 1,129.06 and 690.92 is: 953.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.04 : 1,129.06 = 690.92 : x
  2. Step 2: Convert to fraction form
    818.04/1,129.06 = 690.92/x
  3. Step 3: Cross multiply
    818.04x = 1,129.06 × 690.92
  4. Step 4: Simplify right side
    818.04x = 780,090.14
  5. Step 5: Solve for x
    x = 780,090.14/818.04
  6. Step 6: Final answer
    x = 953.61

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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.