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Finding the Fourth Proportional to 1,318.96, 1,820.16 and 877.20

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Solution

The fourth proportional to 1,318.96, 1,820.16 and 877.20 is: 1,210.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.96 : 1,820.16 = 877.20 : x
  2. Step 2: Convert to fraction form
    1,318.96/1,820.16 = 877.20/x
  3. Step 3: Cross multiply
    1,318.96x = 1,820.16 × 877.20
  4. Step 4: Simplify right side
    1,318.96x = 1,596,644.35
  5. Step 5: Solve for x
    x = 1,596,644.35/1,318.96
  6. Step 6: Final answer
    x = 1,210.53

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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.