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Finding the Fourth Proportional to 640,602.92, 960,579.98 and 213,986.66

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Solution

The fourth proportional to 640,602.92, 960,579.98 and 213,986.66 is: 320,871.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,602.92 : 960,579.98 = 213,986.66 : x
  2. Step 2: Convert to fraction form
    640,602.92/960,579.98 = 213,986.66/x
  3. Step 3: Cross multiply
    640,602.92x = 960,579.98 × 213,986.66
  4. Step 4: Simplify right side
    640,602.92x = 205,551,301,583.07
  5. Step 5: Solve for x
    x = 205,551,301,583.07/640,602.92
  6. Step 6: Final answer
    x = 320,871.63

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1.5x scale

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.