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Finding the Fourth Proportional to 877.21, 1,210.62 and 527.89

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Solution

The fourth proportional to 877.21, 1,210.62 and 527.89 is: 728.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.21 : 1,210.62 = 527.89 : x
  2. Step 2: Convert to fraction form
    877.21/1,210.62 = 527.89/x
  3. Step 3: Cross multiply
    877.21x = 1,210.62 × 527.89
  4. Step 4: Simplify right side
    877.21x = 639,074.19
  5. Step 5: Solve for x
    x = 639,074.19/877.21
  6. Step 6: Final answer
    x = 728.53

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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.