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Finding the Fourth Proportional to 720,045.26, 993,643.20 and 397,748.42

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Solution

The fourth proportional to 720,045.26, 993,643.20 and 397,748.42 is: 548,882.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,045.26 : 993,643.20 = 397,748.42 : x
  2. Step 2: Convert to fraction form
    720,045.26/993,643.20 = 397,748.42/x
  3. Step 3: Cross multiply
    720,045.26x = 993,643.20 × 397,748.42
  4. Step 4: Simplify right side
    720,045.26x = 395,220,012,843.74
  5. Step 5: Solve for x
    x = 395,220,012,843.74/720,045.26
  6. Step 6: Final answer
    x = 548,882.18

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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.