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Finding the Fourth Proportional to 700.65, 1,051.19 and 289.98

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Solution

The fourth proportional to 700.65, 1,051.19 and 289.98 is: 435.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.65 : 1,051.19 = 289.98 : x
  2. Step 2: Convert to fraction form
    700.65/1,051.19 = 289.98/x
  3. Step 3: Cross multiply
    700.65x = 1,051.19 × 289.98
  4. Step 4: Simplify right side
    700.65x = 304,824.08
  5. Step 5: Solve for x
    x = 304,824.08/700.65
  6. Step 6: Final answer
    x = 435.06

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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.