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Finding the Fourth Proportional to 708.41, 1,056.93 and 630.45

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Solution

The fourth proportional to 708.41, 1,056.93 and 630.45 is: 940.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.41 : 1,056.93 = 630.45 : x
  2. Step 2: Convert to fraction form
    708.41/1,056.93 = 630.45/x
  3. Step 3: Cross multiply
    708.41x = 1,056.93 × 630.45
  4. Step 4: Simplify right side
    708.41x = 666,342.70
  5. Step 5: Solve for x
    x = 666,342.70/708.41
  6. Step 6: Final answer
    x = 940.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.