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Finding the Fourth Proportional to 471.16, 646.58 and 469

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Solution

The fourth proportional to 471.16, 646.58 and 469 is: 643.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.16 : 646.58 = 469 : x
  2. Step 2: Convert to fraction form
    471.16/646.58 = 469/x
  3. Step 3: Cross multiply
    471.16x = 646.58 × 469
  4. Step 4: Simplify right side
    471.16x = 303,246.02
  5. Step 5: Solve for x
    x = 303,246.02/471.16
  6. Step 6: Final answer
    x = 643.62

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.