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Finding the Fourth Proportional to 589.12, 812.88 and 340.44

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Solution

The fourth proportional to 589.12, 812.88 and 340.44 is: 469.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.12 : 812.88 = 340.44 : x
  2. Step 2: Convert to fraction form
    589.12/812.88 = 340.44/x
  3. Step 3: Cross multiply
    589.12x = 812.88 × 340.44
  4. Step 4: Simplify right side
    589.12x = 276,733.82
  5. Step 5: Solve for x
    x = 276,733.82/589.12
  6. Step 6: Final answer
    x = 469.74

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1.5x scale

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.