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Finding the Fourth Proportional to 677.61, 1,017.27 and 353.19

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Solution

The fourth proportional to 677.61, 1,017.27 and 353.19 is: 530.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.61 : 1,017.27 = 353.19 : x
  2. Step 2: Convert to fraction form
    677.61/1,017.27 = 353.19/x
  3. Step 3: Cross multiply
    677.61x = 1,017.27 × 353.19
  4. Step 4: Simplify right side
    677.61x = 359,289.59
  5. Step 5: Solve for x
    x = 359,289.59/677.61
  6. Step 6: Final answer
    x = 530.23

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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.