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Finding the Fourth Proportional to 1,070.09, 1,476.71 and 627.91

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Solution

The fourth proportional to 1,070.09, 1,476.71 and 627.91 is: 866.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.09 : 1,476.71 = 627.91 : x
  2. Step 2: Convert to fraction form
    1,070.09/1,476.71 = 627.91/x
  3. Step 3: Cross multiply
    1,070.09x = 1,476.71 × 627.91
  4. Step 4: Simplify right side
    1,070.09x = 927,234.14
  5. Step 5: Solve for x
    x = 927,234.14/1,070.09
  6. Step 6: Final answer
    x = 866.51

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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.