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Finding the Fourth Proportional to 548,339.65, 756,642.78 and 315,842.20

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Solution

The fourth proportional to 548,339.65, 756,642.78 and 315,842.20 is: 435,824.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,339.65 : 756,642.78 = 315,842.20 : x
  2. Step 2: Convert to fraction form
    548,339.65/756,642.78 = 315,842.20/x
  3. Step 3: Cross multiply
    548,339.65x = 756,642.78 × 315,842.20
  4. Step 4: Simplify right side
    548,339.65x = 238,979,722,561.44
  5. Step 5: Solve for x
    x = 238,979,722,561.44/548,339.65
  6. Step 6: Final answer
    x = 435,824.26

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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.