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Finding the Fourth Proportional to 903.54, 1,355.30 and 579.12

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Solution

The fourth proportional to 903.54, 1,355.30 and 579.12 is: 868.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.54 : 1,355.30 = 579.12 : x
  2. Step 2: Convert to fraction form
    903.54/1,355.30 = 579.12/x
  3. Step 3: Cross multiply
    903.54x = 1,355.30 × 579.12
  4. Step 4: Simplify right side
    903.54x = 784,881.34
  5. Step 5: Solve for x
    x = 784,881.34/903.54
  6. Step 6: Final answer
    x = 868.67

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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.