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Finding the Fourth Proportional to 589.04, 812.90 and 340.40

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Solution

The fourth proportional to 589.04, 812.90 and 340.40 is: 469.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.04 : 812.90 = 340.40 : x
  2. Step 2: Convert to fraction form
    589.04/812.90 = 340.40/x
  3. Step 3: Cross multiply
    589.04x = 812.90 × 340.40
  4. Step 4: Simplify right side
    589.04x = 276,711.16
  5. Step 5: Solve for x
    x = 276,711.16/589.04
  6. Step 6: Final answer
    x = 469.77

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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.