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Finding the Fourth Proportional to 1,870.15, 2,805.48 and 637.22

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Solution

The fourth proportional to 1,870.15, 2,805.48 and 637.22 is: 955.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,870.15 : 2,805.48 = 637.22 : x
  2. Step 2: Convert to fraction form
    1,870.15/2,805.48 = 637.22/x
  3. Step 3: Cross multiply
    1,870.15x = 2,805.48 × 637.22
  4. Step 4: Simplify right side
    1,870.15x = 1,787,707.97
  5. Step 5: Solve for x
    x = 1,787,707.97/1,870.15
  6. Step 6: Final answer
    x = 955.92

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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.