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Finding the Fourth Proportional to 554.40, 831.90 and 473.60

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Solution

The fourth proportional to 554.40, 831.90 and 473.60 is: 710.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.40 : 831.90 = 473.60 : x
  2. Step 2: Convert to fraction form
    554.40/831.90 = 473.60/x
  3. Step 3: Cross multiply
    554.40x = 831.90 × 473.60
  4. Step 4: Simplify right side
    554.40x = 393,987.84
  5. Step 5: Solve for x
    x = 393,987.84/554.40
  6. Step 6: Final answer
    x = 710.66

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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.