Home / 420,536.13-630,158.45-285,424.71

Finding the Fourth Proportional to 420,536.13, 630,158.45 and 285,424.71

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Solution

The fourth proportional to 420,536.13, 630,158.45 and 285,424.71 is: 427,698.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,536.13 : 630,158.45 = 285,424.71 : x
  2. Step 2: Convert to fraction form
    420,536.13/630,158.45 = 285,424.71/x
  3. Step 3: Cross multiply
    420,536.13x = 630,158.45 × 285,424.71
  4. Step 4: Simplify right side
    420,536.13x = 179,862,791,418.18
  5. Step 5: Solve for x
    x = 179,862,791,418.18/420,536.13
  6. Step 6: Final answer
    x = 427,698.78

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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.