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Finding the Fourth Proportional to 687.04, 945.92 and 512.16

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Solution

The fourth proportional to 687.04, 945.92 and 512.16 is: 705.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.04 : 945.92 = 512.16 : x
  2. Step 2: Convert to fraction form
    687.04/945.92 = 512.16/x
  3. Step 3: Cross multiply
    687.04x = 945.92 × 512.16
  4. Step 4: Simplify right side
    687.04x = 484,462.39
  5. Step 5: Solve for x
    x = 484,462.39/687.04
  6. Step 6: Final answer
    x = 705.14

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1.5x scale

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.