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Finding the Fourth Proportional to 287,665.71, 431,646.41 and 220,628.40

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Solution

The fourth proportional to 287,665.71, 431,646.41 and 220,628.40 is: 331,055.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,665.71 : 431,646.41 = 220,628.40 : x
  2. Step 2: Convert to fraction form
    287,665.71/431,646.41 = 220,628.40/x
  3. Step 3: Cross multiply
    287,665.71x = 431,646.41 × 220,628.40
  4. Step 4: Simplify right side
    287,665.71x = 95,233,457,355.62
  5. Step 5: Solve for x
    x = 95,233,457,355.62/287,665.71
  6. Step 6: Final answer
    x = 331,055.99

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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.