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Finding the Fourth Proportional to 640,046.70, 960,066.59 and 260,965.96

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Solution

The fourth proportional to 640,046.70, 960,066.59 and 260,965.96 is: 391,447.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,046.70 : 960,066.59 = 260,965.96 : x
  2. Step 2: Convert to fraction form
    640,046.70/960,066.59 = 260,965.96/x
  3. Step 3: Cross multiply
    640,046.70x = 960,066.59 × 260,965.96
  4. Step 4: Simplify right side
    640,046.70x = 250,544,699,218.53
  5. Step 5: Solve for x
    x = 250,544,699,218.53/640,046.70
  6. Step 6: Final answer
    x = 391,447.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.