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Finding the Fourth Proportional to 397,642.45, 548,730.15 and 216,355.12

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Solution

The fourth proportional to 397,642.45, 548,730.15 and 216,355.12 is: 298,561.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,642.45 : 548,730.15 = 216,355.12 : x
  2. Step 2: Convert to fraction form
    397,642.45/548,730.15 = 216,355.12/x
  3. Step 3: Cross multiply
    397,642.45x = 548,730.15 × 216,355.12
  4. Step 4: Simplify right side
    397,642.45x = 118,720,577,450.87
  5. Step 5: Solve for x
    x = 118,720,577,450.87/397,642.45
  6. Step 6: Final answer
    x = 298,561.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.