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Finding the Fourth Proportional to 420,287.08, 630,362.95 and 120,699.52

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Solution

The fourth proportional to 420,287.08, 630,362.95 and 120,699.52 is: 181,029.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,287.08 : 630,362.95 = 120,699.52 : x
  2. Step 2: Convert to fraction form
    420,287.08/630,362.95 = 120,699.52/x
  3. Step 3: Cross multiply
    420,287.08x = 630,362.95 × 120,699.52
  4. Step 4: Simplify right side
    420,287.08x = 76,084,507,368.44
  5. Step 5: Solve for x
    x = 76,084,507,368.44/420,287.08
  6. Step 6: Final answer
    x = 181,029.85

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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.