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Finding the Fourth Proportional to 548,339.12, 756,703.68 and 306,622.16

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Solution

The fourth proportional to 548,339.12, 756,703.68 and 306,622.16 is: 423,136.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,339.12 : 756,703.68 = 306,622.16 : x
  2. Step 2: Convert to fraction form
    548,339.12/756,703.68 = 306,622.16/x
  3. Step 3: Cross multiply
    548,339.12x = 756,703.68 × 306,622.16
  4. Step 4: Simplify right side
    548,339.12x = 232,022,116,841.55
  5. Step 5: Solve for x
    x = 232,022,116,841.55/548,339.12
  6. Step 6: Final answer
    x = 423,136.17

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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.