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Finding the Fourth Proportional to 548,574.84, 756,728.43 and 319,106.31

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Solution

The fourth proportional to 548,574.84, 756,728.43 and 319,106.31 is: 440,189.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,574.84 : 756,728.43 = 319,106.31 : x
  2. Step 2: Convert to fraction form
    548,574.84/756,728.43 = 319,106.31/x
  3. Step 3: Cross multiply
    548,574.84x = 756,728.43 × 319,106.31
  4. Step 4: Simplify right side
    548,574.84x = 241,476,816,969.39
  5. Step 5: Solve for x
    x = 241,476,816,969.39/548,574.84
  6. Step 6: Final answer
    x = 440,189.38

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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.