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Finding the Fourth Proportional to 697.05, 1,041.15 and 657.06

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Solution

The fourth proportional to 697.05, 1,041.15 and 657.06 is: 981.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.05 : 1,041.15 = 657.06 : x
  2. Step 2: Convert to fraction form
    697.05/1,041.15 = 657.06/x
  3. Step 3: Cross multiply
    697.05x = 1,041.15 × 657.06
  4. Step 4: Simplify right side
    697.05x = 684,099.66
  5. Step 5: Solve for x
    x = 684,099.66/697.05
  6. Step 6: Final answer
    x = 981.43

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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.