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Finding the Fourth Proportional to 877.83, 1,209.51 and 656.43

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Solution

The fourth proportional to 877.83, 1,209.51 and 656.43 is: 904.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.83 : 1,209.51 = 656.43 : x
  2. Step 2: Convert to fraction form
    877.83/1,209.51 = 656.43/x
  3. Step 3: Cross multiply
    877.83x = 1,209.51 × 656.43
  4. Step 4: Simplify right side
    877.83x = 793,958.65
  5. Step 5: Solve for x
    x = 793,958.65/877.83
  6. Step 6: Final answer
    x = 904.46

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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.