Home / 420,474.61-630,795-154,237.60

Finding the Fourth Proportional to 420,474.61, 630,795 and 154,237.60

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Solution

The fourth proportional to 420,474.61, 630,795 and 154,237.60 is: 231,386.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,474.61 : 630,795 = 154,237.60 : x
  2. Step 2: Convert to fraction form
    420,474.61/630,795 = 154,237.60/x
  3. Step 3: Cross multiply
    420,474.61x = 630,795 × 154,237.60
  4. Step 4: Simplify right side
    420,474.61x = 97,292,306,892
  5. Step 5: Solve for x
    x = 97,292,306,892/420,474.61
  6. Step 6: Final answer
    x = 231,386.88

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1.5x scale

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.