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Finding the Fourth Proportional to 561.57, 841.56 and 330.51

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Solution

The fourth proportional to 561.57, 841.56 and 330.51 is: 495.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.57 : 841.56 = 330.51 : x
  2. Step 2: Convert to fraction form
    561.57/841.56 = 330.51/x
  3. Step 3: Cross multiply
    561.57x = 841.56 × 330.51
  4. Step 4: Simplify right side
    561.57x = 278,144.00
  5. Step 5: Solve for x
    x = 278,144.00/561.57
  6. Step 6: Final answer
    x = 495.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.