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Finding the Fourth Proportional to 380,628.40, 525,323.12 and 219,451.92

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Solution

The fourth proportional to 380,628.40, 525,323.12 and 219,451.92 is: 302,875.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,628.40 : 525,323.12 = 219,451.92 : x
  2. Step 2: Convert to fraction form
    380,628.40/525,323.12 = 219,451.92/x
  3. Step 3: Cross multiply
    380,628.40x = 525,323.12 × 219,451.92
  4. Step 4: Simplify right side
    380,628.40x = 115,283,167,304.39
  5. Step 5: Solve for x
    x = 115,283,167,304.39/380,628.40
  6. Step 6: Final answer
    x = 302,875.89

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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.