Home / 420,904.30-630,663.90-243,101.20

Finding the Fourth Proportional to 420,904.30, 630,663.90 and 243,101.20

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Solution

The fourth proportional to 420,904.30, 630,663.90 and 243,101.20 is: 364,251.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,904.30 : 630,663.90 = 243,101.20 : x
  2. Step 2: Convert to fraction form
    420,904.30/630,663.90 = 243,101.20/x
  3. Step 3: Cross multiply
    420,904.30x = 630,663.90 × 243,101.20
  4. Step 4: Simplify right side
    420,904.30x = 153,315,150,886.68
  5. Step 5: Solve for x
    x = 153,315,150,886.68/420,904.30
  6. Step 6: Final answer
    x = 364,251.80

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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.