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Finding the Fourth Proportional to 703.44, 1,059.60 and 649.98

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Solution

The fourth proportional to 703.44, 1,059.60 and 649.98 is: 979.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.44 : 1,059.60 = 649.98 : x
  2. Step 2: Convert to fraction form
    703.44/1,059.60 = 649.98/x
  3. Step 3: Cross multiply
    703.44x = 1,059.60 × 649.98
  4. Step 4: Simplify right side
    703.44x = 688,718.81
  5. Step 5: Solve for x
    x = 688,718.81/703.44
  6. Step 6: Final answer
    x = 979.07

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.