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Finding the Fourth Proportional to 706.64, 974.74 and 509.92

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Solution

The fourth proportional to 706.64, 974.74 and 509.92 is: 703.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.64 : 974.74 = 509.92 : x
  2. Step 2: Convert to fraction form
    706.64/974.74 = 509.92/x
  3. Step 3: Cross multiply
    706.64x = 974.74 × 509.92
  4. Step 4: Simplify right side
    706.64x = 497,039.42
  5. Step 5: Solve for x
    x = 497,039.42/706.64
  6. Step 6: Final answer
    x = 703.38

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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.