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Finding the Fourth Proportional to 707.45, 1,061.28 and 296.55

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Solution

The fourth proportional to 707.45, 1,061.28 and 296.55 is: 444.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.45 : 1,061.28 = 296.55 : x
  2. Step 2: Convert to fraction form
    707.45/1,061.28 = 296.55/x
  3. Step 3: Cross multiply
    707.45x = 1,061.28 × 296.55
  4. Step 4: Simplify right side
    707.45x = 314,722.58
  5. Step 5: Solve for x
    x = 314,722.58/707.45
  6. Step 6: Final answer
    x = 444.87

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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.