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Finding the Fourth Proportional to 675.04, 931.60 and 478.60

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Solution

The fourth proportional to 675.04, 931.60 and 478.60 is: 660.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.04 : 931.60 = 478.60 : x
  2. Step 2: Convert to fraction form
    675.04/931.60 = 478.60/x
  3. Step 3: Cross multiply
    675.04x = 931.60 × 478.60
  4. Step 4: Simplify right side
    675.04x = 445,863.76
  5. Step 5: Solve for x
    x = 445,863.76/675.04
  6. Step 6: Final answer
    x = 660.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.