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Finding the Fourth Proportional to 860.02, 1,289.73 and 340

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Solution

The fourth proportional to 860.02, 1,289.73 and 340 is: 509.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.02 : 1,289.73 = 340 : x
  2. Step 2: Convert to fraction form
    860.02/1,289.73 = 340/x
  3. Step 3: Cross multiply
    860.02x = 1,289.73 × 340
  4. Step 4: Simplify right side
    860.02x = 438,508.20
  5. Step 5: Solve for x
    x = 438,508.20/860.02
  6. Step 6: Final answer
    x = 509.88

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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.