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Finding the Fourth Proportional to 587.20, 810 and 470.56

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Solution

The fourth proportional to 587.20, 810 and 470.56 is: 649.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.20 : 810 = 470.56 : x
  2. Step 2: Convert to fraction form
    587.20/810 = 470.56/x
  3. Step 3: Cross multiply
    587.20x = 810 × 470.56
  4. Step 4: Simplify right side
    587.20x = 381,153.60
  5. Step 5: Solve for x
    x = 381,153.60/587.20
  6. Step 6: Final answer
    x = 649.10

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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.