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Finding the Fourth Proportional to 547,642.40, 821,317.80 and 168,562.40

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Solution

The fourth proportional to 547,642.40, 821,317.80 and 168,562.40 is: 252,798.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,642.40 : 821,317.80 = 168,562.40 : x
  2. Step 2: Convert to fraction form
    547,642.40/821,317.80 = 168,562.40/x
  3. Step 3: Cross multiply
    547,642.40x = 821,317.80 × 168,562.40
  4. Step 4: Simplify right side
    547,642.40x = 138,443,299,530.72
  5. Step 5: Solve for x
    x = 138,443,299,530.72/547,642.40
  6. Step 6: Final answer
    x = 252,798.72

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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.