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Finding the Fourth Proportional to 555.40, 833.34 and 411.40

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Solution

The fourth proportional to 555.40, 833.34 and 411.40 is: 617.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.40 : 833.34 = 411.40 : x
  2. Step 2: Convert to fraction form
    555.40/833.34 = 411.40/x
  3. Step 3: Cross multiply
    555.40x = 833.34 × 411.40
  4. Step 4: Simplify right side
    555.40x = 342,836.08
  5. Step 5: Solve for x
    x = 342,836.08/555.40
  6. Step 6: Final answer
    x = 617.28

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Double scale
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Similar ratio
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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.