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Finding the Fourth Proportional to 695,765.64, 960,144.16 and 389,840.80

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Solution

The fourth proportional to 695,765.64, 960,144.16 and 389,840.80 is: 537,973.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,765.64 : 960,144.16 = 389,840.80 : x
  2. Step 2: Convert to fraction form
    695,765.64/960,144.16 = 389,840.80/x
  3. Step 3: Cross multiply
    695,765.64x = 960,144.16 × 389,840.80
  4. Step 4: Simplify right side
    695,765.64x = 374,303,367,449.73
  5. Step 5: Solve for x
    x = 374,303,367,449.73/695,765.64
  6. Step 6: Final answer
    x = 537,973.34

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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.