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Finding the Fourth Proportional to 1,017.18, 1,403.65 and 575.05

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Solution

The fourth proportional to 1,017.18, 1,403.65 and 575.05 is: 793.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.18 : 1,403.65 = 575.05 : x
  2. Step 2: Convert to fraction form
    1,017.18/1,403.65 = 575.05/x
  3. Step 3: Cross multiply
    1,017.18x = 1,403.65 × 575.05
  4. Step 4: Simplify right side
    1,017.18x = 807,167.49
  5. Step 5: Solve for x
    x = 807,167.49/1,017.18
  6. Step 6: Final answer
    x = 793.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.