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Finding the Fourth Proportional to 1,063.71, 1,466.64 and 783.90

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Solution

The fourth proportional to 1,063.71, 1,466.64 and 783.90 is: 1,080.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,063.71 : 1,466.64 = 783.90 : x
  2. Step 2: Convert to fraction form
    1,063.71/1,466.64 = 783.90/x
  3. Step 3: Cross multiply
    1,063.71x = 1,466.64 × 783.90
  4. Step 4: Simplify right side
    1,063.71x = 1,149,699.10
  5. Step 5: Solve for x
    x = 1,149,699.10/1,063.71
  6. Step 6: Final answer
    x = 1,080.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.