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Finding the Fourth Proportional to 1,050.66, 1,572.84 and 638.51

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Solution

The fourth proportional to 1,050.66, 1,572.84 and 638.51 is: 955.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.66 : 1,572.84 = 638.51 : x
  2. Step 2: Convert to fraction form
    1,050.66/1,572.84 = 638.51/x
  3. Step 3: Cross multiply
    1,050.66x = 1,572.84 × 638.51
  4. Step 4: Simplify right side
    1,050.66x = 1,004,266.20
  5. Step 5: Solve for x
    x = 1,004,266.20/1,050.66
  6. Step 6: Final answer
    x = 955.84

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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.