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Finding the Fourth Proportional to 1,019.71, 1,527.11 and 556.34

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Solution

The fourth proportional to 1,019.71, 1,527.11 and 556.34 is: 833.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019.71 : 1,527.11 = 556.34 : x
  2. Step 2: Convert to fraction form
    1,019.71/1,527.11 = 556.34/x
  3. Step 3: Cross multiply
    1,019.71x = 1,527.11 × 556.34
  4. Step 4: Simplify right side
    1,019.71x = 849,583.26
  5. Step 5: Solve for x
    x = 849,583.26/1,019.71
  6. Step 6: Final answer
    x = 833.17

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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.