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Finding the Fourth Proportional to 555.65, 836.54 and 491.01

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Solution

The fourth proportional to 555.65, 836.54 and 491.01 is: 739.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.65 : 836.54 = 491.01 : x
  2. Step 2: Convert to fraction form
    555.65/836.54 = 491.01/x
  3. Step 3: Cross multiply
    555.65x = 836.54 × 491.01
  4. Step 4: Simplify right side
    555.65x = 410,750.73
  5. Step 5: Solve for x
    x = 410,750.73/555.65
  6. Step 6: Final answer
    x = 739.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.