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Finding the Fourth Proportional to 555.03, 831.70 and 266.07

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Solution

The fourth proportional to 555.03, 831.70 and 266.07 is: 398.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.03 : 831.70 = 266.07 : x
  2. Step 2: Convert to fraction form
    555.03/831.70 = 266.07/x
  3. Step 3: Cross multiply
    555.03x = 831.70 × 266.07
  4. Step 4: Simplify right side
    555.03x = 221,290.42
  5. Step 5: Solve for x
    x = 221,290.42/555.03
  6. Step 6: Final answer
    x = 398.70

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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.