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Finding the Fourth Proportional to 555.10, 766.12 and 319.09

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Solution

The fourth proportional to 555.10, 766.12 and 319.09 is: 440.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.10 : 766.12 = 319.09 : x
  2. Step 2: Convert to fraction form
    555.10/766.12 = 319.09/x
  3. Step 3: Cross multiply
    555.10x = 766.12 × 319.09
  4. Step 4: Simplify right side
    555.10x = 244,461.23
  5. Step 5: Solve for x
    x = 244,461.23/555.10
  6. Step 6: Final answer
    x = 440.39

Related Problems

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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.