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Finding the Fourth Proportional to 548,821.80, 757,409.22 and 307,132.20

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Solution

The fourth proportional to 548,821.80, 757,409.22 and 307,132.20 is: 423,862.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,821.80 : 757,409.22 = 307,132.20 : x
  2. Step 2: Convert to fraction form
    548,821.80/757,409.22 = 307,132.20/x
  3. Step 3: Cross multiply
    548,821.80x = 757,409.22 × 307,132.20
  4. Step 4: Simplify right side
    548,821.80x = 232,624,760,038.88
  5. Step 5: Solve for x
    x = 232,624,760,038.88/548,821.80
  6. Step 6: Final answer
    x = 423,862.10

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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.