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Finding the Fourth Proportional to 1,019.47, 1,529.30 and 289.06

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Solution

The fourth proportional to 1,019.47, 1,529.30 and 289.06 is: 433.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019.47 : 1,529.30 = 289.06 : x
  2. Step 2: Convert to fraction form
    1,019.47/1,529.30 = 289.06/x
  3. Step 3: Cross multiply
    1,019.47x = 1,529.30 × 289.06
  4. Step 4: Simplify right side
    1,019.47x = 442,059.46
  5. Step 5: Solve for x
    x = 442,059.46/1,019.47
  6. Step 6: Final answer
    x = 433.62

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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.