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Finding the Fourth Proportional to 548,980.64, 756,991.68 and 357,639.20

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Solution

The fourth proportional to 548,980.64, 756,991.68 and 357,639.20 is: 493,150.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,980.64 : 756,991.68 = 357,639.20 : x
  2. Step 2: Convert to fraction form
    548,980.64/756,991.68 = 357,639.20/x
  3. Step 3: Cross multiply
    548,980.64x = 756,991.68 × 357,639.20
  4. Step 4: Simplify right side
    548,980.64x = 270,729,898,841.86
  5. Step 5: Solve for x
    x = 270,729,898,841.86/548,980.64
  6. Step 6: Final answer
    x = 493,150.18

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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.