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Finding the Fourth Proportional to 1,326.07, 1,987.68 and 632.30

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Solution

The fourth proportional to 1,326.07, 1,987.68 and 632.30 is: 947.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.07 : 1,987.68 = 632.30 : x
  2. Step 2: Convert to fraction form
    1,326.07/1,987.68 = 632.30/x
  3. Step 3: Cross multiply
    1,326.07x = 1,987.68 × 632.30
  4. Step 4: Simplify right side
    1,326.07x = 1,256,810.06
  5. Step 5: Solve for x
    x = 1,256,810.06/1,326.07
  6. Step 6: Final answer
    x = 947.77

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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.