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Finding the Fourth Proportional to 380,674.23, 525,330.54 and 208,590.78

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Solution

The fourth proportional to 380,674.23, 525,330.54 and 208,590.78 is: 287,855.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,674.23 : 525,330.54 = 208,590.78 : x
  2. Step 2: Convert to fraction form
    380,674.23/525,330.54 = 208,590.78/x
  3. Step 3: Cross multiply
    380,674.23x = 525,330.54 × 208,590.78
  4. Step 4: Simplify right side
    380,674.23x = 109,579,107,096.42
  5. Step 5: Solve for x
    x = 109,579,107,096.42/380,674.23
  6. Step 6: Final answer
    x = 287,855.33

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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.