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Finding the Fourth Proportional to 1,070.63, 1,477.62 and 628.77

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Solution

The fourth proportional to 1,070.63, 1,477.62 and 628.77 is: 867.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.63 : 1,477.62 = 628.77 : x
  2. Step 2: Convert to fraction form
    1,070.63/1,477.62 = 628.77/x
  3. Step 3: Cross multiply
    1,070.63x = 1,477.62 × 628.77
  4. Step 4: Simplify right side
    1,070.63x = 929,083.13
  5. Step 5: Solve for x
    x = 929,083.13/1,070.63
  6. Step 6: Final answer
    x = 867.80

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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.