Home / 420,437.06-630,280.49-154,135.38

Finding the Fourth Proportional to 420,437.06, 630,280.49 and 154,135.38

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Solution

The fourth proportional to 420,437.06, 630,280.49 and 154,135.38 is: 231,065.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,437.06 : 630,280.49 = 154,135.38 : x
  2. Step 2: Convert to fraction form
    420,437.06/630,280.49 = 154,135.38/x
  3. Step 3: Cross multiply
    420,437.06x = 630,280.49 × 154,135.38
  4. Step 4: Simplify right side
    420,437.06x = 97,148,522,062.06
  5. Step 5: Solve for x
    x = 97,148,522,062.06/420,437.06
  6. Step 6: Final answer
    x = 231,065.56

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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.