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Finding the Fourth Proportional to 582.58, 873.87 and 420.58

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Solution

The fourth proportional to 582.58, 873.87 and 420.58 is: 630.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.58 : 873.87 = 420.58 : x
  2. Step 2: Convert to fraction form
    582.58/873.87 = 420.58/x
  3. Step 3: Cross multiply
    582.58x = 873.87 × 420.58
  4. Step 4: Simplify right side
    582.58x = 367,532.24
  5. Step 5: Solve for x
    x = 367,532.24/582.58
  6. Step 6: Final answer
    x = 630.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.