Home / 420,311.04-630,895.42-307,656.64

Finding the Fourth Proportional to 420,311.04, 630,895.42 and 307,656.64

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Solution

The fourth proportional to 420,311.04, 630,895.42 and 307,656.64 is: 461,798.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,311.04 : 630,895.42 = 307,656.64 : x
  2. Step 2: Convert to fraction form
    420,311.04/630,895.42 = 307,656.64/x
  3. Step 3: Cross multiply
    420,311.04x = 630,895.42 × 307,656.64
  4. Step 4: Simplify right side
    420,311.04x = 194,099,165,108.59
  5. Step 5: Solve for x
    x = 194,099,165,108.59/420,311.04
  6. Step 6: Final answer
    x = 461,798.87

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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.