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Finding the Fourth Proportional to 662,903.81, 914,777.75 and 387,287.21

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Solution

The fourth proportional to 662,903.81, 914,777.75 and 387,287.21 is: 534,439.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,903.81 : 914,777.75 = 387,287.21 : x
  2. Step 2: Convert to fraction form
    662,903.81/914,777.75 = 387,287.21/x
  3. Step 3: Cross multiply
    662,903.81x = 914,777.75 × 387,287.21
  4. Step 4: Simplify right side
    662,903.81x = 354,281,724,536.33
  5. Step 5: Solve for x
    x = 354,281,724,536.33/662,903.81
  6. Step 6: Final answer
    x = 534,439.11

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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.