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Finding the Fourth Proportional to 1,870.22, 2,805.35 and 571.70

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Solution

The fourth proportional to 1,870.22, 2,805.35 and 571.70 is: 857.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,870.22 : 2,805.35 = 571.70 : x
  2. Step 2: Convert to fraction form
    1,870.22/2,805.35 = 571.70/x
  3. Step 3: Cross multiply
    1,870.22x = 2,805.35 × 571.70
  4. Step 4: Simplify right side
    1,870.22x = 1,603,801.71
  5. Step 5: Solve for x
    x = 1,603,801.71/1,870.22
  6. Step 6: Final answer
    x = 857.55

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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.