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Finding the Fourth Proportional to 741, 1,022.88 and 647.88

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Solution

The fourth proportional to 741, 1,022.88 and 647.88 is: 894.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    741 : 1,022.88 = 647.88 : x
  2. Step 2: Convert to fraction form
    741/1,022.88 = 647.88/x
  3. Step 3: Cross multiply
    741x = 1,022.88 × 647.88
  4. Step 4: Simplify right side
    741x = 662,703.49
  5. Step 5: Solve for x
    x = 662,703.49/741
  6. Step 6: Final answer
    x = 894.34

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1.5x scale

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.