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Finding the Fourth Proportional to 1,031.71, 1,423.71 and 589.66

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Solution

The fourth proportional to 1,031.71, 1,423.71 and 589.66 is: 813.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.71 : 1,423.71 = 589.66 : x
  2. Step 2: Convert to fraction form
    1,031.71/1,423.71 = 589.66/x
  3. Step 3: Cross multiply
    1,031.71x = 1,423.71 × 589.66
  4. Step 4: Simplify right side
    1,031.71x = 839,504.84
  5. Step 5: Solve for x
    x = 839,504.84/1,031.71
  6. Step 6: Final answer
    x = 813.70

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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.