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Finding the Fourth Proportional to 473.68, 653.50 and 287.05

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Solution

The fourth proportional to 473.68, 653.50 and 287.05 is: 396.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.68 : 653.50 = 287.05 : x
  2. Step 2: Convert to fraction form
    473.68/653.50 = 287.05/x
  3. Step 3: Cross multiply
    473.68x = 653.50 × 287.05
  4. Step 4: Simplify right side
    473.68x = 187,582.47
  5. Step 5: Solve for x
    x = 187,582.47/473.68
  6. Step 6: Final answer
    x = 396.01

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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.