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Finding the Fourth Proportional to 756.61, 1,133.86 and 410.13

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Solution

The fourth proportional to 756.61, 1,133.86 and 410.13 is: 614.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.61 : 1,133.86 = 410.13 : x
  2. Step 2: Convert to fraction form
    756.61/1,133.86 = 410.13/x
  3. Step 3: Cross multiply
    756.61x = 1,133.86 × 410.13
  4. Step 4: Simplify right side
    756.61x = 465,030.00
  5. Step 5: Solve for x
    x = 465,030.00/756.61
  6. Step 6: Final answer
    x = 614.62

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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.