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Finding the Fourth Proportional to 378,666.09, 522,522.90 and 208,889.28

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Solution

The fourth proportional to 378,666.09, 522,522.90 and 208,889.28 is: 288,247.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,666.09 : 522,522.90 = 208,889.28 : x
  2. Step 2: Convert to fraction form
    378,666.09/522,522.90 = 208,889.28/x
  3. Step 3: Cross multiply
    378,666.09x = 522,522.90 × 208,889.28
  4. Step 4: Simplify right side
    378,666.09x = 109,149,432,364.51
  5. Step 5: Solve for x
    x = 109,149,432,364.51/378,666.09
  6. Step 6: Final answer
    x = 288,247.18

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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.