Home / 409,623.40-614,435.10-390,269.80

Finding the Fourth Proportional to 409,623.40, 614,435.10 and 390,269.80

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Solution

The fourth proportional to 409,623.40, 614,435.10 and 390,269.80 is: 585,404.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,623.40 : 614,435.10 = 390,269.80 : x
  2. Step 2: Convert to fraction form
    409,623.40/614,435.10 = 390,269.80/x
  3. Step 3: Cross multiply
    409,623.40x = 614,435.10 × 390,269.80
  4. Step 4: Simplify right side
    409,623.40x = 239,795,463,589.98
  5. Step 5: Solve for x
    x = 239,795,463,589.98/409,623.40
  6. Step 6: Final answer
    x = 585,404.70

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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.