Home / 420,810.30-630,522.90-243,007.20

Finding the Fourth Proportional to 420,810.30, 630,522.90 and 243,007.20

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Solution

The fourth proportional to 420,810.30, 630,522.90 and 243,007.20 is: 364,110.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,810.30 : 630,522.90 = 243,007.20 : x
  2. Step 2: Convert to fraction form
    420,810.30/630,522.90 = 243,007.20/x
  3. Step 3: Cross multiply
    420,810.30x = 630,522.90 × 243,007.20
  4. Step 4: Simplify right side
    420,810.30x = 153,221,604,464.88
  5. Step 5: Solve for x
    x = 153,221,604,464.88/420,810.30
  6. Step 6: Final answer
    x = 364,110.87

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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.