Home / 420,814.30-630,528.90-243,011.20

Finding the Fourth Proportional to 420,814.30, 630,528.90 and 243,011.20

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Solution

The fourth proportional to 420,814.30, 630,528.90 and 243,011.20 is: 364,116.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,814.30 : 630,528.90 = 243,011.20 : x
  2. Step 2: Convert to fraction form
    420,814.30/630,528.90 = 243,011.20/x
  3. Step 3: Cross multiply
    420,814.30x = 630,528.90 × 243,011.20
  4. Step 4: Simplify right side
    420,814.30x = 153,225,584,623.68
  5. Step 5: Solve for x
    x = 153,225,584,623.68/420,814.30
  6. Step 6: Final answer
    x = 364,116.87

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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.