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Finding the Fourth Proportional to 934.76, 1,289.59 and 620.18

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Solution

The fourth proportional to 934.76, 1,289.59 and 620.18 is: 855.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.76 : 1,289.59 = 620.18 : x
  2. Step 2: Convert to fraction form
    934.76/1,289.59 = 620.18/x
  3. Step 3: Cross multiply
    934.76x = 1,289.59 × 620.18
  4. Step 4: Simplify right side
    934.76x = 799,777.93
  5. Step 5: Solve for x
    x = 799,777.93/934.76
  6. Step 6: Final answer
    x = 855.60

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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.