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Finding the Fourth Proportional to 707.66, 1,061.48 and 383.12

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Solution

The fourth proportional to 707.66, 1,061.48 and 383.12 is: 574.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.66 : 1,061.48 = 383.12 : x
  2. Step 2: Convert to fraction form
    707.66/1,061.48 = 383.12/x
  3. Step 3: Cross multiply
    707.66x = 1,061.48 × 383.12
  4. Step 4: Simplify right side
    707.66x = 406,669.87
  5. Step 5: Solve for x
    x = 406,669.87/707.66
  6. Step 6: Final answer
    x = 574.67

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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.