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Finding the Fourth Proportional to 675.55, 1,011.93 and 512.74

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Solution

The fourth proportional to 675.55, 1,011.93 and 512.74 is: 768.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.55 : 1,011.93 = 512.74 : x
  2. Step 2: Convert to fraction form
    675.55/1,011.93 = 512.74/x
  3. Step 3: Cross multiply
    675.55x = 1,011.93 × 512.74
  4. Step 4: Simplify right side
    675.55x = 518,856.99
  5. Step 5: Solve for x
    x = 518,856.99/675.55
  6. Step 6: Final answer
    x = 768.05

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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.