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Finding the Fourth Proportional to 554.37, 831.58 and 280.13

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Solution

The fourth proportional to 554.37, 831.58 and 280.13 is: 420.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.37 : 831.58 = 280.13 : x
  2. Step 2: Convert to fraction form
    554.37/831.58 = 280.13/x
  3. Step 3: Cross multiply
    554.37x = 831.58 × 280.13
  4. Step 4: Simplify right side
    554.37x = 232,950.51
  5. Step 5: Solve for x
    x = 232,950.51/554.37
  6. Step 6: Final answer
    x = 420.21

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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.