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Finding the Fourth Proportional to 720,396.12, 994,062.06 and 398,087.00

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Solution

The fourth proportional to 720,396.12, 994,062.06 and 398,087.00 is: 549,313.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,396.12 : 994,062.06 = 398,087.00 : x
  2. Step 2: Convert to fraction form
    720,396.12/994,062.06 = 398,087.00/x
  3. Step 3: Cross multiply
    720,396.12x = 994,062.06 × 398,087.00
  4. Step 4: Simplify right side
    720,396.12x = 395,723,178,308.91
  5. Step 5: Solve for x
    x = 395,723,178,308.91/720,396.12
  6. Step 6: Final answer
    x = 549,313.31

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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.