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Finding the Fourth Proportional to 1,019.61, 1,529.08 and 557.29

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Solution

The fourth proportional to 1,019.61, 1,529.08 and 557.29 is: 835.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019.61 : 1,529.08 = 557.29 : x
  2. Step 2: Convert to fraction form
    1,019.61/1,529.08 = 557.29/x
  3. Step 3: Cross multiply
    1,019.61x = 1,529.08 × 557.29
  4. Step 4: Simplify right side
    1,019.61x = 852,140.99
  5. Step 5: Solve for x
    x = 852,140.99/1,019.61
  6. Step 6: Final answer
    x = 835.75

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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.