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Finding the Fourth Proportional to 587.61, 810.45 and 385.32

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Solution

The fourth proportional to 587.61, 810.45 and 385.32 is: 531.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.61 : 810.45 = 385.32 : x
  2. Step 2: Convert to fraction form
    587.61/810.45 = 385.32/x
  3. Step 3: Cross multiply
    587.61x = 810.45 × 385.32
  4. Step 4: Simplify right side
    587.61x = 312,282.59
  5. Step 5: Solve for x
    x = 312,282.59/587.61
  6. Step 6: Final answer
    x = 531.45

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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.