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Finding the Fourth Proportional to 877.80, 1,316.05 and 531.07

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Solution

The fourth proportional to 877.80, 1,316.05 and 531.07 is: 796.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.80 : 1,316.05 = 531.07 : x
  2. Step 2: Convert to fraction form
    877.80/1,316.05 = 531.07/x
  3. Step 3: Cross multiply
    877.80x = 1,316.05 × 531.07
  4. Step 4: Simplify right side
    877.80x = 698,914.67
  5. Step 5: Solve for x
    x = 698,914.67/877.80
  6. Step 6: Final answer
    x = 796.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.