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Finding the Fourth Proportional to 555.18, 766.08 and 319.16

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Solution

The fourth proportional to 555.18, 766.08 and 319.16 is: 440.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.18 : 766.08 = 319.16 : x
  2. Step 2: Convert to fraction form
    555.18/766.08 = 319.16/x
  3. Step 3: Cross multiply
    555.18x = 766.08 × 319.16
  4. Step 4: Simplify right side
    555.18x = 244,498.26
  5. Step 5: Solve for x
    x = 244,498.26/555.18
  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.