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Finding the Fourth Proportional to 555.68, 833.54 and 425.91

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Solution

The fourth proportional to 555.68, 833.54 and 425.91 is: 638.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.68 : 833.54 = 425.91 : x
  2. Step 2: Convert to fraction form
    555.68/833.54 = 425.91/x
  3. Step 3: Cross multiply
    555.68x = 833.54 × 425.91
  4. Step 4: Simplify right side
    555.68x = 355,014.02
  5. Step 5: Solve for x
    x = 355,014.02/555.68
  6. Step 6: Final answer
    x = 638.89

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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.