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Finding the Fourth Proportional to 1,031.87, 1,423.63 and 589.45

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Solution

The fourth proportional to 1,031.87, 1,423.63 and 589.45 is: 813.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.87 : 1,423.63 = 589.45 : x
  2. Step 2: Convert to fraction form
    1,031.87/1,423.63 = 589.45/x
  3. Step 3: Cross multiply
    1,031.87x = 1,423.63 × 589.45
  4. Step 4: Simplify right side
    1,031.87x = 839,158.70
  5. Step 5: Solve for x
    x = 839,158.70/1,031.87
  6. Step 6: Final answer
    x = 813.24

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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.