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Finding the Fourth Proportional to 420,354.36, 630,308.88 and 183,420.36

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Solution

The fourth proportional to 420,354.36, 630,308.88 and 183,420.36 is: 275,033.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,354.36 : 630,308.88 = 183,420.36 : x
  2. Step 2: Convert to fraction form
    420,354.36/630,308.88 = 183,420.36/x
  3. Step 3: Cross multiply
    420,354.36x = 630,308.88 × 183,420.36
  4. Step 4: Simplify right side
    420,354.36x = 115,611,481,680.80
  5. Step 5: Solve for x
    x = 115,611,481,680.80/420,354.36
  6. Step 6: Final answer
    x = 275,033.38

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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.