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Finding the Fourth Proportional to 713.53, 1,068.72 and 438.76

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Solution

The fourth proportional to 713.53, 1,068.72 and 438.76 is: 657.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.53 : 1,068.72 = 438.76 : x
  2. Step 2: Convert to fraction form
    713.53/1,068.72 = 438.76/x
  3. Step 3: Cross multiply
    713.53x = 1,068.72 × 438.76
  4. Step 4: Simplify right side
    713.53x = 468,911.59
  5. Step 5: Solve for x
    x = 468,911.59/713.53
  6. Step 6: Final answer
    x = 657.17

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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.