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Finding the Fourth Proportional to 487.29, 670.75 and 425

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Solution

The fourth proportional to 487.29, 670.75 and 425 is: 585.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.29 : 670.75 = 425 : x
  2. Step 2: Convert to fraction form
    487.29/670.75 = 425/x
  3. Step 3: Cross multiply
    487.29x = 670.75 × 425
  4. Step 4: Simplify right side
    487.29x = 285,066.63
  5. Step 5: Solve for x
    x = 285,066.63/487.29
  6. Step 6: Final answer
    x = 585.01

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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.