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Finding the Fourth Proportional to 555.13, 830.80 and 456.49

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Solution

The fourth proportional to 555.13, 830.80 and 456.49 is: 683.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.13 : 830.80 = 456.49 : x
  2. Step 2: Convert to fraction form
    555.13/830.80 = 456.49/x
  3. Step 3: Cross multiply
    555.13x = 830.80 × 456.49
  4. Step 4: Simplify right side
    555.13x = 379,251.89
  5. Step 5: Solve for x
    x = 379,251.89/555.13
  6. Step 6: Final answer
    x = 683.18

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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.