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Finding the Fourth Proportional to 642.77, 888.77 and 632.34

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Solution

The fourth proportional to 642.77, 888.77 and 632.34 is: 874.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.77 : 888.77 = 632.34 : x
  2. Step 2: Convert to fraction form
    642.77/888.77 = 632.34/x
  3. Step 3: Cross multiply
    642.77x = 888.77 × 632.34
  4. Step 4: Simplify right side
    642.77x = 562,008.90
  5. Step 5: Solve for x
    x = 562,008.90/642.77
  6. Step 6: Final answer
    x = 874.35

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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.