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Finding the Fourth Proportional to 494,417.80, 741,626.70 and 139,427.20

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Solution

The fourth proportional to 494,417.80, 741,626.70 and 139,427.20 is: 209,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,417.80 : 741,626.70 = 139,427.20 : x
  2. Step 2: Convert to fraction form
    494,417.80/741,626.70 = 139,427.20/x
  3. Step 3: Cross multiply
    494,417.80x = 741,626.70 × 139,427.20
  4. Step 4: Simplify right side
    494,417.80x = 103,402,934,226.24
  5. Step 5: Solve for x
    x = 103,402,934,226.24/494,417.80
  6. Step 6: Final answer
    x = 209,140.80

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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.