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Finding the Fourth Proportional to 934.76, 1,290.49 and 561.83

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Solution

The fourth proportional to 934.76, 1,290.49 and 561.83 is: 775.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.76 : 1,290.49 = 561.83 : x
  2. Step 2: Convert to fraction form
    934.76/1,290.49 = 561.83/x
  3. Step 3: Cross multiply
    934.76x = 1,290.49 × 561.83
  4. Step 4: Simplify right side
    934.76x = 725,033.19
  5. Step 5: Solve for x
    x = 725,033.19/934.76
  6. Step 6: Final answer
    x = 775.64

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Double scale
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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.