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Finding the Fourth Proportional to 1,715.77, 2,574.40 and 838.01

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Solution

The fourth proportional to 1,715.77, 2,574.40 and 838.01 is: 1,257.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,715.77 : 2,574.40 = 838.01 : x
  2. Step 2: Convert to fraction form
    1,715.77/2,574.40 = 838.01/x
  3. Step 3: Cross multiply
    1,715.77x = 2,574.40 × 838.01
  4. Step 4: Simplify right side
    1,715.77x = 2,157,364.46
  5. Step 5: Solve for x
    x = 2,157,364.46/1,715.77
  6. Step 6: Final answer
    x = 1,257.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.