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Finding the Fourth Proportional to 561.70, 774.93 and 328.69

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Solution

The fourth proportional to 561.70, 774.93 and 328.69 is: 453.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.70 : 774.93 = 328.69 : x
  2. Step 2: Convert to fraction form
    561.70/774.93 = 328.69/x
  3. Step 3: Cross multiply
    561.70x = 774.93 × 328.69
  4. Step 4: Simplify right side
    561.70x = 254,711.74
  5. Step 5: Solve for x
    x = 254,711.74/561.70
  6. Step 6: Final answer
    x = 453.47

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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.