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Finding the Fourth Proportional to 420,657.42, 630,347.67 and 308,412.36

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Solution

The fourth proportional to 420,657.42, 630,347.67 and 308,412.36 is: 462,150.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,657.42 : 630,347.67 = 308,412.36 : x
  2. Step 2: Convert to fraction form
    420,657.42/630,347.67 = 308,412.36/x
  3. Step 3: Cross multiply
    420,657.42x = 630,347.67 × 308,412.36
  4. Step 4: Simplify right side
    420,657.42x = 194,407,012,525.20
  5. Step 5: Solve for x
    x = 194,407,012,525.20/420,657.42
  6. Step 6: Final answer
    x = 462,150.44

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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.