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Finding the Fourth Proportional to 713.71, 1,068.69 and 603.70

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Solution

The fourth proportional to 713.71, 1,068.69 and 603.70 is: 903.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.71 : 1,068.69 = 603.70 : x
  2. Step 2: Convert to fraction form
    713.71/1,068.69 = 603.70/x
  3. Step 3: Cross multiply
    713.71x = 1,068.69 × 603.70
  4. Step 4: Simplify right side
    713.71x = 645,173.76
  5. Step 5: Solve for x
    x = 645,173.76/713.71
  6. Step 6: Final answer
    x = 903.97

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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.