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Finding the Fourth Proportional to 720,011.40, 993,609.45 and 397,743.99

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Solution

The fourth proportional to 720,011.40, 993,609.45 and 397,743.99 is: 548,883.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,011.40 : 993,609.45 = 397,743.99 : x
  2. Step 2: Convert to fraction form
    720,011.40/993,609.45 = 397,743.99/x
  3. Step 3: Cross multiply
    720,011.40x = 993,609.45 × 397,743.99
  4. Step 4: Simplify right side
    720,011.40x = 395,202,187,144.71
  5. Step 5: Solve for x
    x = 395,202,187,144.71/720,011.40
  6. Step 6: Final answer
    x = 548,883.24

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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.