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Finding the Fourth Proportional to 849.92, 1,172.70 and 570.50

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Solution

The fourth proportional to 849.92, 1,172.70 and 570.50 is: 787.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.92 : 1,172.70 = 570.50 : x
  2. Step 2: Convert to fraction form
    849.92/1,172.70 = 570.50/x
  3. Step 3: Cross multiply
    849.92x = 1,172.70 × 570.50
  4. Step 4: Simplify right side
    849.92x = 669,025.35
  5. Step 5: Solve for x
    x = 669,025.35/849.92
  6. Step 6: Final answer
    x = 787.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.