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Finding the Fourth Proportional to 934.76, 1,289.90 and 561.75

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Solution

The fourth proportional to 934.76, 1,289.90 and 561.75 is: 775.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.76 : 1,289.90 = 561.75 : x
  2. Step 2: Convert to fraction form
    934.76/1,289.90 = 561.75/x
  3. Step 3: Cross multiply
    934.76x = 1,289.90 × 561.75
  4. Step 4: Simplify right side
    934.76x = 724,601.33
  5. Step 5: Solve for x
    x = 724,601.33/934.76
  6. Step 6: Final answer
    x = 775.17

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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.