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Finding the Fourth Proportional to 1,070.84, 1,477.40 and 677.96

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Solution

The fourth proportional to 1,070.84, 1,477.40 and 677.96 is: 935.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.84 : 1,477.40 = 677.96 : x
  2. Step 2: Convert to fraction form
    1,070.84/1,477.40 = 677.96/x
  3. Step 3: Cross multiply
    1,070.84x = 1,477.40 × 677.96
  4. Step 4: Simplify right side
    1,070.84x = 1,001,618.10
  5. Step 5: Solve for x
    x = 1,001,618.10/1,070.84
  6. Step 6: Final answer
    x = 935.36

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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.