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Finding the Fourth Proportional to 720,257.24, 993,903.36 and 397,963.64

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Solution

The fourth proportional to 720,257.24, 993,903.36 and 397,963.64 is: 549,161.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,257.24 : 993,903.36 = 397,963.64 : x
  2. Step 2: Convert to fraction form
    720,257.24/993,903.36 = 397,963.64/x
  3. Step 3: Cross multiply
    720,257.24x = 993,903.36 × 397,963.64
  4. Step 4: Simplify right side
    720,257.24x = 395,537,398,953.83
  5. Step 5: Solve for x
    x = 395,537,398,953.83/720,257.24
  6. Step 6: Final answer
    x = 549,161.30

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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.