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Finding the Fourth Proportional to 380,813.55, 525,522.70 and 211,058.61

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Solution

The fourth proportional to 380,813.55, 525,522.70 and 211,058.61 is: 291,260.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,813.55 : 525,522.70 = 211,058.61 : x
  2. Step 2: Convert to fraction form
    380,813.55/525,522.70 = 211,058.61/x
  3. Step 3: Cross multiply
    380,813.55x = 525,522.70 × 211,058.61
  4. Step 4: Simplify right side
    380,813.55x = 110,916,087,957.83
  5. Step 5: Solve for x
    x = 110,916,087,957.83/380,813.55
  6. Step 6: Final answer
    x = 291,260.88

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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.