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Finding the Fourth Proportional to 700.12, 966.36 and 405.51

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Solution

The fourth proportional to 700.12, 966.36 and 405.51 is: 559.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.12 : 966.36 = 405.51 : x
  2. Step 2: Convert to fraction form
    700.12/966.36 = 405.51/x
  3. Step 3: Cross multiply
    700.12x = 966.36 × 405.51
  4. Step 4: Simplify right side
    700.12x = 391,868.64
  5. Step 5: Solve for x
    x = 391,868.64/700.12
  6. Step 6: Final answer
    x = 559.72

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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.