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Finding the Fourth Proportional to 1,117.63, 1,675.43 and 570.21

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Solution

The fourth proportional to 1,117.63, 1,675.43 and 570.21 is: 854.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.63 : 1,675.43 = 570.21 : x
  2. Step 2: Convert to fraction form
    1,117.63/1,675.43 = 570.21/x
  3. Step 3: Cross multiply
    1,117.63x = 1,675.43 × 570.21
  4. Step 4: Simplify right side
    1,117.63x = 955,339.94
  5. Step 5: Solve for x
    x = 955,339.94/1,117.63
  6. Step 6: Final answer
    x = 854.79

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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.