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Finding the Fourth Proportional to 380,448.90, 525,005.55 and 219,310.74

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Solution

The fourth proportional to 380,448.90, 525,005.55 and 219,310.74 is: 302,640.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,448.90 : 525,005.55 = 219,310.74 : x
  2. Step 2: Convert to fraction form
    380,448.90/525,005.55 = 219,310.74/x
  3. Step 3: Cross multiply
    380,448.90x = 525,005.55 × 219,310.74
  4. Step 4: Simplify right side
    380,448.90x = 115,139,355,674.61
  5. Step 5: Solve for x
    x = 115,139,355,674.61/380,448.90
  6. Step 6: Final answer
    x = 302,640.79

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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.