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Finding the Fourth Proportional to 474.02, 653.64 and 318.50

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Solution

The fourth proportional to 474.02, 653.64 and 318.50 is: 439.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.02 : 653.64 = 318.50 : x
  2. Step 2: Convert to fraction form
    474.02/653.64 = 318.50/x
  3. Step 3: Cross multiply
    474.02x = 653.64 × 318.50
  4. Step 4: Simplify right side
    474.02x = 208,184.34
  5. Step 5: Solve for x
    x = 208,184.34/474.02
  6. Step 6: Final answer
    x = 439.19

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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.