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Finding the Fourth Proportional to 700.71, 1,056.13 and 661.02

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Solution

The fourth proportional to 700.71, 1,056.13 and 661.02 is: 996.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.71 : 1,056.13 = 661.02 : x
  2. Step 2: Convert to fraction form
    700.71/1,056.13 = 661.02/x
  3. Step 3: Cross multiply
    700.71x = 1,056.13 × 661.02
  4. Step 4: Simplify right side
    700.71x = 698,123.05
  5. Step 5: Solve for x
    x = 698,123.05/700.71
  6. Step 6: Final answer
    x = 996.31

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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.