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Finding the Fourth Proportional to 587.40, 812.19 and 578.10

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Solution

The fourth proportional to 587.40, 812.19 and 578.10 is: 799.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.40 : 812.19 = 578.10 : x
  2. Step 2: Convert to fraction form
    587.40/812.19 = 578.10/x
  3. Step 3: Cross multiply
    587.40x = 812.19 × 578.10
  4. Step 4: Simplify right side
    587.40x = 469,527.04
  5. Step 5: Solve for x
    x = 469,527.04/587.40
  6. Step 6: Final answer
    x = 799.33

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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.