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Finding the Fourth Proportional to 903.08, 1,354.76 and 318.05

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Solution

The fourth proportional to 903.08, 1,354.76 and 318.05 is: 477.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.08 : 1,354.76 = 318.05 : x
  2. Step 2: Convert to fraction form
    903.08/1,354.76 = 318.05/x
  3. Step 3: Cross multiply
    903.08x = 1,354.76 × 318.05
  4. Step 4: Simplify right side
    903.08x = 430,881.42
  5. Step 5: Solve for x
    x = 430,881.42/903.08
  6. Step 6: Final answer
    x = 477.13

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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.