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Finding the Fourth Proportional to 555.39, 766.30 and 358.87

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Solution

The fourth proportional to 555.39, 766.30 and 358.87 is: 495.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.39 : 766.30 = 358.87 : x
  2. Step 2: Convert to fraction form
    555.39/766.30 = 358.87/x
  3. Step 3: Cross multiply
    555.39x = 766.30 × 358.87
  4. Step 4: Simplify right side
    555.39x = 275,002.08
  5. Step 5: Solve for x
    x = 275,002.08/555.39
  6. Step 6: Final answer
    x = 495.15

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.